After having a negative reaction to Frontline, I started using Program on my two dogs, Amber and Wiley. Both have responded very well, there are no fleas in sight, and there have been no side effects this time around.

My cat lives inside, but it doesn't mean she's protected from fleas...I learned the hard way...but after using this product she hasn't had any flea problems...I love it...it's kind of hard getting her to take the pill because she doesn't eat soft food...but, still a great product!!