If a cat doesn't have fleas then don't treat. Too many chemicals can cause other problems. Once a cat leaves it's mother and has been wormed regularly in it's first 12 months, it shouldn't, unless a great hunter, need treating. One will see worms in the litter tray
or in the case of tape worms, they are expelled looking like grains of rice. Round worms come out wriggling …..
does Advocate kill fleas and worms? There ain't much else internally, unless foreign worms are in your area having been brought in via pets with Passports.
As for fleas - if a pet has a pale coloured short coat they can be seen easily. They tend to collect at the top of the tail and around the neck. A gentle weekly go over with a comb should be enough. I had a flea zapper for ours as they had black hair, it would bleep when it killed a flea
- very therapeutic