2 In 1 Monthly Oral Flea Control Capsules for Small and Medium Dogs is only labeled for use on dogs. 2 in 1 Monthly Oral Flea Control Capsules for Cats is what you would use for your cat.
No, the 2 In 1 Monthly Oral Flea Control Capsules for Small and Medium Dogs is to only be given once a month for flea control.
If the source of fleas is not taken care of, fleas will re infest your dog before the month is over since Lufenuron does not kill adult fleas and needs time to control the flea population, in this case you will need to give your dog Nitenpyram (Capstar) only capsules between the monthly doses to help kill new adult fleas