Which Flea/Heartworm Prevention?? So, I am looking into which flea and tick and heartworm prevention I should use on my yorkie. I have been looking around on what 1800petmeds has to offer and found this stuff called Sentinel. From what I read, it prevents heartworm and fleas both. Is anyone familiar with Sentinel? What are your thoughts on it? Does anyone else have suggestions for flea/heartworm prevention? |