since you guys seem knowledgeable on this, can i ask a question when you talk about heartguard do you mean the chewable type, that's what i have mostly given my yorkies and they seem to tolerate it well. then i use the topical flea control 15 days apart, i use parastar and have not had problems. i found the combo of the heartworm and the flea and tick control to overpowering to give at one time |