for Dogs 23-44 lbs - 6 Month Supply

I applied Certifect on my dogs as directed 2 months in a row and both times it made my dogs sick. One dog got so sick that I ended up taking him to the Pet ER because of Bloody diarrhea. I will never use this product again. If I could return it I would.

Excellent produc... Zero problems with ticks and fles... It's amazing.