F - Fer

Fet - Fi

Fl - Fre

Fro - Fv

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Fleas: Any of various small, wingless, bloodsucking insects of the order Siphonaptera that have legs adapted for jumping and are parasitic on warm-blooded animals.

Flehmening/Flehmen Reaction: The facial gesture similar to a grimace that a cat makes when it draws air over and stimulates the Jacobsen's Organ in the mouth.

FLUTD: Acronym for feline lower urinary tract disease, a blanket term referring to a number of conditions in the lower urinary tract such as infection and bladder stones.

Follicle: A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges.

FPL: Acronym for Feline Panleukopaenia

Fracture: A break, rupture, or crack, especially in bone or cartilage.

Free-Feed: A process allowing a cat open access throughout the day to a food bowl.