Your cat may be on the wrong diet, be very obese, may have food allergies, or an endocrine disorder, kidney disease
or more. When a cat stops grooming it can be almost anything even heart disease
, since it is a very subtle sign of something that is not quite right.
What kind of diet is your cat on?
Before going to the vet you can try the following:
Please place her on an all canned diet such as Evo/Innovo, Wellness grain free, Natures Wellness-Instinct, and others.