Yep, I just checked...mine get the Heartgard Plus in the blue box (yorkie on the front) for up to 25lbs. My dogs range in size from 5lbs. to 8lbs. and they each get one dose at the beginning of each month. They've never had any ill effects from them, and they actually think that they are treats...silly pups!
Debbie
(Tea', Katie and Paige)