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href="/wiki/File:Cheval_ardennais_expo.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Cheval_ardennais_expo.jpg/220px-Cheval_ardennais_expo.jpg" decoding="async" width="220" height="162" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Cheval_ardennais_expo.jpg/330px-Cheval_ardennais_expo.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Cheval_ardennais_expo.jpg/440px-Cheval_ardennais_expo.jpg 2x" data-file-width="2334" data-file-height="1716" /></a><figcaption>A <a href="/wiki/Draft_horse" title="Draft horse">draft horse</a> sleeping while standing up</figcaption></figure> <p>The <b>stay apparatus</b> is an arrangement of muscles, tendons, and ligaments that work together so that an animal can remain standing with virtually no muscular effort.<sup id="cite_ref-Ferraro_1-0" class="reference"><a href="#cite_note-Ferraro-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> It is best known as the mechanism by which <a href="/wiki/Horse" title="Horse">horses</a> can enter a <a href="/wiki/Horse#Sleep_patterns" title="Horse">light sleep</a> while still standing up.<sup id="cite_ref-Pascoe_2-0" class="reference"><a href="#cite_note-Pascoe-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The effect is that an animal can distribute its weight on three limbs while resting a fourth in a flexed, non-weight-bearing position. The animal can periodically shift its weight to rest a different leg, and thus all limbs are able to be individually rested, reducing overall wear and tear. The relatively <a href="/wiki/Limbs_of_the_horse" title="Limbs of the horse">slim legs</a> of certain large mammals, such as horses and cows, would be subject to dangerous levels of fatigue if not for the stay apparatus.<sup id="cite_ref-Asprea_3-0" class="reference"><a href="#cite_note-Asprea-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>The lower part of the stay apparatus consists of the suspensory apparatus, which is the same in both front and hind legs, while the upper portion of the stay apparatus is different between the fore and hind limbs.<sup id="cite_ref-Harris253_4-0" class="reference"><a href="#cite_note-Harris253-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>In the front legs, the stay apparatus engages when the animal's muscles relax.<sup id="cite_ref-Pascoe_2-1" class="reference"><a href="#cite_note-Pascoe-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The upper portion of the stay apparatus in the forelimbs includes the major attachment, extensor, and flexor muscles and tendons.<sup id="cite_ref-Harris253_4-1" class="reference"><a href="#cite_note-Harris253-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> In essence, the accessory check ligaments act as tension bands, they stabilize the carpus (called the "knee" in horses), fetlock and bones of the foot. In the upper portion, the shoulder and elbow joints have several musculo-tendinous structures that keep these joints in passive extension.<sup id="cite_ref-Ferraro_1-1" class="reference"><a href="#cite_note-Ferraro-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>In the hind limbs, the major muscles, ligaments and tendons work with the <a href="/w/index.php?title=Reciprocal_joints&action=edit&redlink=1" class="new" title="Reciprocal joints (page does not exist)">reciprocal joints</a> of the hock and stifle,<sup id="cite_ref-Harris253_4-2" class="reference"><a href="#cite_note-Harris253-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> which are a <a href="/w/index.php?title=Reciprocal_apparatus&action=edit&redlink=1" class="new" title="Reciprocal apparatus (page does not exist)">reciprocal apparatus</a> that forces the hock and stifle to flex and extend in unison. The medial patellar ligament "locks" the <a href="/wiki/Patella" title="Patella">patella</a> ("kneecap") in place and this prevents flexion in both the stifle and the hock.<sup id="cite_ref-Ferraro_1-2" class="reference"><a href="#cite_note-Ferraro-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> At the <a href="/wiki/Horse_anatomy" class="mw-redirect" title="Horse anatomy">stifle</a> joint, a "hook" structure on the inside bottom end of the <a href="/wiki/Femur" title="Femur">femur</a> cups the patella and the medial patella <a href="/wiki/Ligament" title="Ligament">ligament</a>, prevents the leg from bending.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Cattle have a stay apparatus which allows them to rest individual limbs,<sup id="cite_ref-Asprea_3-1" class="reference"><a href="#cite_note-Asprea-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> but cattle generally do not sleep standing up.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Dinohippus_leidyanus_foot_bones.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Dinohippus_leidyanus_foot_bones.JPG/130px-Dinohippus_leidyanus_foot_bones.JPG" decoding="async" width="130" height="377" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Dinohippus_leidyanus_foot_bones.JPG/195px-Dinohippus_leidyanus_foot_bones.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Dinohippus_leidyanus_foot_bones.JPG/260px-Dinohippus_leidyanus_foot_bones.JPG 2x" data-file-width="773" data-file-height="2242" /></a><figcaption>The ancient Dinohippus had a rudimentary stay apparatus</figcaption></figure> <p><a href="/wiki/Horse_anatomy" class="mw-redirect" title="Horse anatomy">Anatomical structures</a> important in the stay apparatus include: </p> <ul><li>The <a href="/w/index.php?title=Suspensory_apparatus&action=edit&redlink=1" class="new" title="Suspensory apparatus (page does not exist)">suspensory apparatus</a>, including the superficial and deep digital flexor tendons along with the proximal and distal check ligaments.<sup id="cite_ref-Ferraro_1-3" class="reference"><a href="#cite_note-Ferraro-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The distal sesamoidean ligaments run from the sesamoid bones to the two <a href="/wiki/Pastern" title="Pastern">pastern</a> bones.</li> <li>Biceps brachii: originates from the caudal side of the scapula and inserts into the radial tuberosity. Flexes the elbow, and is the part of the stay apparatus that keeps the elbow and shoulder from bending.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li> <li>Triceps brachii: has three heads which originate and insert into separate places: the caudal side of the scapula and into the lateral & caudal side of the olecranon, from the humerus and into the lateral side of the olecranon, and from the medial side of the humerus and into the medial and cranial side of the olecranon. The triceps brachii is the most important extensor of the elbow. Important part of the stay apparatus to keep the elbow fixed.</li> <li>Extensor carpi radialis: originates from the humerus, continues distally along the dorsal side of the radius, and inserts on the metacarpal tuberosity. Flexes the elbow, extends the carpus. Also used in the stay apparatus to fix the carpus.</li> <li>The patellar tendon and patellar ligaments.<sup id="cite_ref-Asprea_3-2" class="reference"><a href="#cite_note-Asprea-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li></ul> <p>The most common of the ancient, now-extinct <a href="/wiki/Wild_horse" title="Wild horse">wild horse</a> species in North America, <a href="/wiki/Dinohippus" title="Dinohippus">Dinohippus</a>, had a distinctive passive stay apparatus that helped it conserve energy while standing for long periods. Dinohippus was the first horse to show a rudimentary form of this characteristic, and its existence provided additional evidence of the close relationship between Dinohippus and the modern <a href="/wiki/Equus_(genus)" title="Equus (genus)">Equus</a>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Stay_apparatus&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-Ferraro-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Ferraro_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Ferraro_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Ferraro_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Ferraro_1-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFFerraroStoverWhitcomb" class="citation web cs1">Ferraro, Gregory L.; Stover, Susan M.; Whitcomb, Mary Beth. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150218171852/http://www.vetmed.ucdavis.edu/ceh/docs/special/Pubs-SuspBrochure-bkm-sec.pdf">"Suspensory Ligament Injuries in Horses"</a> <span class="cs1-format">(PDF)</span>. <i>Center for Equine Health</i>. School of Veterinary Medicine, University of California, Davis. Archived from <a rel="nofollow" class="external text" href="http://www.vetmed.ucdavis.edu/ceh/docs/special/Pubs-SuspBrochure-bkm-sec.pdf">the original</a> <span class="cs1-format">(PDF)</span> on February 18, 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">19 May</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Center+for+Equine+Health&rft.atitle=Suspensory+Ligament+Injuries+in+Horses&rft.aulast=Ferraro&rft.aufirst=Gregory+L.&rft.au=Stover%2C+Susan+M.&rft.au=Whitcomb%2C+Mary+Beth&rft_id=http%3A%2F%2Fwww.vetmed.ucdavis.edu%2Fceh%2Fdocs%2Fspecial%2FPubs-SuspBrochure-bkm-sec.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></span> </li> <li id="cite_note-Pascoe-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Pascoe_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Pascoe_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPascoe,_Elaine" class="citation web cs1">Pascoe, Elaine. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20070927193341/http://equisearch.com/horses_care/health/behavior/eqzzz629/">"How Horses Sleep"</a>. <i>Equisearch.com</i>. Archived from <a rel="nofollow" class="external text" href="http://equisearch.com/horses_care/health/behavior/eqzzz629/">the original</a> on 2007-09-27<span class="reference-accessdate">. Retrieved <span class="nowrap">2007-03-23</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Equisearch.com&rft.atitle=How+Horses+Sleep&rft.au=Pascoe%2C+Elaine&rft_id=http%3A%2F%2Fequisearch.com%2Fhorses_care%2Fhealth%2Fbehavior%2Feqzzz629%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></span> </li> <li id="cite_note-Asprea-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Asprea_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Asprea_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Asprea_3-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAspreaSturtz2012" class="citation book cs1">Asprea, Lori; Sturtz, Robin (2012). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=74Hd_YLuHsUC&pg=PT109"><i>Anatomy and physiology for veterinary technicians and nurses a clinical approach</i></a>. Chichester: Iowa State University Pre. pp. 109–111. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9781118405840" title="Special:BookSources/9781118405840"><bdi>9781118405840</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Anatomy+and+physiology+for+veterinary+technicians+and+nurses+a+clinical+approach.&rft.place=Chichester&rft.pages=109-111&rft.pub=Iowa+State+University+Pre&rft.date=2012&rft.isbn=9781118405840&rft.aulast=Asprea&rft.aufirst=Lori&rft.au=Sturtz%2C+Robin&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D74Hd_YLuHsUC%26pg%3DPT109&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></span> </li> <li id="cite_note-Harris253-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-Harris253_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Harris253_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Harris253_4-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text">Harris, p. 253</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.horseware.com/ezine/questions.asp">"Horseware Ireland North America - The worlds leading equine product leader for horse and rider"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Horseware+Ireland+North+America+-+The+worlds+leading+equine+product+leader+for+horse+and+rider&rft_id=http%3A%2F%2Fwww.horseware.com%2Fezine%2Fquestions.asp&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140125195053/http://www.mvma.ca/resources/animal-owners/animal-mythbusters">"Animal MythBusters | Manitoba Veterinary Medical Association"</a>. <i>www.mvma.ca</i>. Archived from <a rel="nofollow" class="external text" href="http://www.mvma.ca/resources/animal-owners/animal-mythbusters#cow%20tipping">the original</a> on 2014-01-25.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.mvma.ca&rft.atitle=Animal+MythBusters+%7C+Manitoba+Veterinary+Medical+Association&rft_id=http%3A%2F%2Fwww.mvma.ca%2Fresources%2Fanimal-owners%2Fanimal-mythbusters%23cow%2520tipping&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span> </span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWatsonWilson2007" class="citation journal cs1">Watson, JC; Wilson, AM (January 2007). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2100266">"Muscle architecture of biceps brachii, triceps brachii and supraspinatus in the horse"</a>. <i>J. Anat</i>. <b>210</b> (1): 32–40. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1111%2Fj.1469-7580.2006.00669.x">10.1111/j.1469-7580.2006.00669.x</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2100266">2100266</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/17229281">17229281</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=J.+Anat.&rft.atitle=Muscle+architecture+of+biceps+brachii%2C+triceps+brachii+and+supraspinatus+in+the+horse&rft.volume=210&rft.issue=1&rft.pages=32-40&rft.date=2007-01&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC2100266%23id-name%3DPMC&rft_id=info%3Apmid%2F17229281&rft_id=info%3Adoi%2F10.1111%2Fj.1469-7580.2006.00669.x&rft.aulast=Watson&rft.aufirst=JC&rft.au=Wilson%2C+AM&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC2100266&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.flmnh.ufl.edu/fhc/dinohippus1.htm">Florida Museum of Natural History</a></span> </li> </ol></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHarris1996" class="citation book cs1">Harris, Susan E. 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Howell Book House. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0876059817" title="Special:BookSources/0876059817"><bdi>0876059817</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+United+States+Pony+Club+Manual+of+Horsemanship%3A+Advanced+Horsemanship+-+B%2C+HA%2C+A+Levels&rft.pub=Howell+Book+House&rft.date=1996&rft.isbn=0876059817&rft.aulast=Harris&rft.aufirst=Susan+E.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStay+apparatus" class="Z3988"></span></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Stay_apparatus&oldid=1228291053">https://en.wikipedia.org/w/index.php?title=Stay_apparatus&oldid=1228291053</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Horse_anatomy" title="Category:Horse anatomy">Horse anatomy</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 10 June 2024, at 12:40<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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