When I was little, a very long time ago, we lived in the country and a zillion cats. We knew when they needed worming as you'd see the buggers crawling out of their bums!
Now I am a grown up and have one adult cat. She has worm treatment in with her flea drops and a 6 monthly worming tablet.
What kind of worms are these for? She seems to be constantly hungry. Would I know if she had worms? Will regular treatment keep them at bay? She isn't a hunter really and when she does catch anything she just looks confused at it rather than eating it.