785. An Animal's "Garments" on Shabbos
Shabbos 20:10
An animal may not go out on Shabbos with a bell on its blanket, a seal around its neck or on its blanket, a strap on its foot or a restraint on its neck (comparable to a dog’s cone). A donkey may not go out with a saddlecloth unless it was tied to the donkey before Shabbos. A camel may not go out with a patch on its hump or tail unless it is tied to both the hump and the tail. A camel may not go out on Shabbos with its front leg or rear leg tied; this applies to all other animals as well.
Shabbos 20:11
Chickens may not go out with cords or straps tied to their feet (for identification or for restraint). Rams may not go out with a wagon under their fatted tails (to keep them from dragging on the ground). Ewes may not go out with wood in their nostrils. A calf may not go out with a small yoke on its neck intended to train it to wear a yoke later when plowing. An animal may not go out with a muzzle on its mouth to keep it from biting or eating. A cow may not go out with a hedgehog skin on its udders to keep other animals from sucking while it sleeps; it may likewise not go out with a strap between its horns, whether it was placed there for decorative purposes or as a form of restraint. If a goat's horns are pierced, it may go out on Shabbos with a rope tied to its horns. It is not permitted with the rope tied to its beard out of concern that it might be pulled off and one may come to carry it by hand in a public domain. This applies in all similar such circumstances.