Program for Cats up to 10 lbs, Orange, Oral Suspension 12 Pack (1013935)
Program for Cats up to 10 lbs Oral Suspension, 12 Pack (Orange) does not kill adult fleas, but contains lufenuron which inhibits the development of flea eggs to break the flea life cycle. Program can be used with Capstar to control extreme flea infestations.
This might not be the best choice if your cat already has a serious flea infestation, but if you're looking for good, solid protection against new fleas, definitely go with Program. This is highly effective.