[kjc]

There are many different kinds... I would talk to your vet about it, and buy it from them. I wouldn't use any grocery store brand or Petco/Petsmart/online kind. Personally I use Revolution topical on mine, bc it does Heartworms, fleas, ticks, mites, etc. See their website. But, also discuss with your vet, as he/she is more familiar with your pup and any problems he/she may have. Also, you can bathe them 2 hours after application... most others after 24 hours. You apply it once a month and it gets absorbed through their skin into their system. No need to reapply after the bath.