Question: what are the symptoms if my cat has worms?
Answer: Weight loss and a distended stomach. Cats who have worms often still have a good appetite, but you may notice that despite eating a normal amount, they are losing weight. ... 
Coarse fur. ... 
Change in bowel habits. ... 
Visible traces of worms. ... 
Unusual behaviour. ... 
Prevention is better than cure. ... 
Treating worms in cats.