Heartgard Plus question Does anyone use this? If so, what dosage or how much do you give? I have some from the vet that are chewables for dogs up to 25 lbs. My vet said to give her 1, once a month. She is only 3.6 lbs and I am wondering if this is too big of a dosage for her. I trust my vet but just want to be safe. Any opinions from others that give Heartgard Plus? |