F - Fer

Fet - Fi

Fl - Fre

Fro - Fv

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Fetus: The unborn young of a viviparous vertebrate having a basic structural resemblance to the adult animal.

FIA: Acronym for Feline Infectious Anemia

FIE: Acronym for Feline Infectious Enteritis, also known as panleukopaenia

Fillers: Meant to increase volume, chemicals and other indigestible material that are added to pet food.

FIP: Acronym for feline infectious peritonitis, a highly contagious, often difficult to diagnose disease associated with the feline coronavirus.

FIV: Acronym for feline immunodeficiency virus, a disease usually transmitted by saliva to blood (deep biting wounds).