The most recognized glands are the tarsal and metatarsal glands, located on a deer's hind leg. The tarsal gland, located on the leg's inner surface, serves to identify individuals. The metatarsal gland, found lower on the leg and on the outside, may help in regulating the animal's body temperature. Interdigital glands, located between the hooves, probably leave scent trails for other deer to follow. Pre-orbital glands function as tear glands and may relay sex and social hierarchy when rubbed on branches.
Whitetails have four sets of external glands that are used primarily for communication.
Gland secretions can describe a deer's social status, breeding condition and health. Antlers and Antler Growth Whitetails are probably best known and sought after for their antlers. Sometimes incorrectly referred to as horns, deer antlers are cast and regrown annually. Horns, on the other hand, grow continually much like hooves. Another difference between horns and antlers is that horns, like hooves, are composed of keratin, whereas antlers are composed of bone.