I've used Revolution on all my girls from 3 lbs. to 8 lbs. I love it because it is dosed by weight. My 3 pounder gets the puppy dosage of 1-5 lbs. and the others get the 5-10 lbs. dosage. We have never had a flea and they get annual heartworm testing. We use it year round in Texas and have never had a problem. |