My cat's don't go outsideDrontal is a broad spectrum dewormer, dosed by weight and obtained from the vet. I don't think the pills are large at all. Certainly no larger than the kibble some cats swallow whole. I pill a friends' two cats every three months with drontal. Do your cats go out?
Profender is a spot on broad spectrum dewormer. It is, like the drontal, dosed by weight and must be obtained from the vet. It is put on the back of the neck once a month.
Revolution flea control spot on controls roundworm and hookworm (and ear mites) but does not kill tapeworm.
Don't use over the counter de-wormers, they don't work, and put your cats at risk, they are not safe.
My vet is the type I have to see each cat ugh do you think petco might have drontal? and how much is itDrontal is a good broad-spectrum de-wormer (both roundworms and tapeworms), and is available OTC now (in case your vet is a pain and won't give dewormers without seeing each cat). You dose by weight so make sure you have a decent scale.
You can get plain pyrantel pamoate suspension (generic Strongid--only kills rounds worms, hookworms, etc., not tapeworms) OTC but it's not usually found in pet stores. The easiest kind to find is sold for horses. You have to make sure to get the dosage right based on weight and the strength of the suspension (some are 50 mg/ml, some are 100 mg/ml, it's on the bottle so read the label).
Usually if you see worms in the poop it's round worms but I think a round of Drontal for everybody wouldn't be a bad idea.