Glad you have decided to give heart worm prevention. I use heart guard for several reasons one Callie will not take sentinel two I feel really great about heart guard because it has been around so long I feel very confident in it. Now Sentinel doesn't kill fleas it just keeps them from reproducing. Both are pretty trust worthy meds. I also use Advantix because it is the only thing that works with ticks here and it also repels mosquitoes.
__________________  Taylor  My babies Joey, Penny , Ollie & Dixie   Callie Mae, you will forever be in my heart! |