Restraint have injured or ill dogs handle a severely ill or injured dog, as if it's likely to bite. Many times a severely injured or ill animal responds out of extreme pain and biting is a dog's major defense against pain. take extra precautions when handling any injured animal to prevent a human injury. Place a muzzle on an injured animal. You may if necessary, place a towel or blanket over a particularly violent animal to comment. This draping technique often produces only a brief period of calm