Question: what are the symptoms of a cat with fleas?
Answer: Scratching or biting. Flea bites are very itchy, so it's likely your cat may be scratching more than usual. ... 
Excessive grooming. ... 
Hair loss. ... 
Red patches of skin. ... 
Adult fleas on coat. ... 
Flea dirt. ... 
Tapeworm eggs in stool. ... 
Irritable and restless.