Uakari
A monkey with a red face, often in exotic pet collections.
Udders
It is found in female mammals like goats and dogs during lactation.
Ulna
A bone in the forelimb of animals, including dogs and cats.
Ultrasonic Communication
Some rodents, like hamsters and mice, communicate using sounds humans can’t hear.
Ultrasonography
A technique used in veterinary medicine to scan pets.
Ultraviolet Vision
Some birds and reptiles can see ultraviolet light.
Umbilicus
The belly button area in newborn animals.
Uncropped
Describes natural ears in dogs, as opposed to cropped ears.
Underbite
A dental condition in pets where the lower teeth stick out more than the upper teeth.
Undercoat
The dense, soft layer of fur beneath the topcoat of many animals.
Underfur
The soft, insulating fur layer in animals like rabbits and ferrets.
Underwing
The hidden feathers beneath a bird’s primary wings.
Ungual
Related to claws, hooves, or nails in animals.
Upcurl
A term for tails that curl upward, common in breeds like the Akita
Uplander
A term for certain hunting dogs that work on land rather than water.
Upper Respiratory Infection (URI)
It is a common illness in cats, especially in shelters.
Upstanding Ears
A term for naturally erect ears in dogs and cats.
Urates
A type of waste excreted by reptiles and birds.
Urchin Crab
A type of hermit crab that uses sea urchins for protection.
Urchinfish
A rare type of pet fish.
Urial
A type of wild sheep; some sheep breeds are domesticated as pets or farm animals.
Urine Marking
A behaviour in cats and dogs where they leave small amounts of urine to claim territory.
Urohydrosis
A cooling mechanism used by some birds that involves urinating on their legs
Urolithiasis
A condition where bladder stones form in pets.
Uromastyx
A type of lizard commonly kept as an exotic pet.
Uropygium
The area at the base of a bird’s tail where oil glands are located.
Urostyle
A bone found in amphibians like frogs is sometimes kept as exotic pets.
Urson
Another name for the North American porcupine, which some people keep as exotic pets.
Uvea
The middle layer of the eye can be affected by disease in pets.
Uveitis
An eye inflammation that can affect pets.