Hock: The collection of bones of the hind leg forming the joint between the second thigh and the metatarsus; the dog's true heel.

Hocking Out: Spread hocks.

Hocks Well Let Down: Hock joints close to the ground.

Holt: The lair of the fox or other animal in tree roots, banks, drains, or similar hideouts. Lodge.

HomeAgain: Brand name for microchips sold by Schering Plough to veterinarians for permanent identification of companion animals.

Homeopathic: A system of veterinary practice that treats a disease by the administration of very minute doses of a remedy that in a healthy animal would produce the symptoms of the disease that is being treated.

Honorable Scars: Scars from injuries suffered as a result of work.

Hook Tail: A tail that is carried down, but with the tip curled upwards.

Hormone: A substance, usually a peptide or steroid, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity, such as growth or metabolism.

Hound: A dog of any of various breeds commonly used for hunting mammals by sight or by scent.

Hound Group: Group of dogs used for hunting game by scent or sight.

Hound-Marked: A coloration composed of white, tan, or black. The ground color, usually white, may be marked with tan and/or black patches on the head, back, legs, and tail. The extent and the exact location of such markings, however, differ in breeds and individual dogs. Color definitions may vary by breed. Always check the breed standard for the definitive color description.

Housebreak: To train a pet to live cleanly in a house.

Hucklebones: Top of the hipbones.

Humane Societies: Groups that aims to stop animal and human suffering due to cruelty or other reasons.

Humerus: The bone of the arm (i.e., the upper arm).

Identification: On-dog system whereby a dog may be identified to a record (i.e., microchip, tattoo or DNA).

Hypertension: Abnormally elevated blood pressure.

Hyperthermia: Unusually high body temperature that can result from heat stroke.

Hypothermia: Abnormally low body temperature, typically resulting from exposure to cold environmental conditions.