Having worms can be an upsetting experience for cats as there is no permanent treatment vets recommend worming cats every 3 6 months this is the best way to protect your cat from unwelcome guests r r does my cat have worms r r although not all cats will show symptoms of roundworms and tapeworms there are some signs you can look out for such as r r weight loss r r constant hunger r r looking pot bellied r r being less active than normal r r vomiting or chronic diarrhoea r r small segments