Do you use Sentinal/Heartworm Young puppies? Hi everyone. I am really enjoying this site. I have 2 Yorkies, sisters 14 weeks old. They have just reached the 2 lb mark where they can start using the Sentinel. My question is....how many people use the Sentinel? Did you start using it when your dog was very young? Just wondering about the effects of starting medication at such an early age. |