Your question really doesn't make sense. Are you are saying that your vet said you must have Charlie tested before you can buy more heartworm pills?
The American Heartworm Society (AHS) recommends that all dogs be checked yearly for heartworms. I'm sure your vet is following their guidelines.
If Charlie had heartworms and is given the medication, it could be very dangerous. It would kill the heartworms which could clog the arteries in the heart.
As far as ordering from Petmeds.com or any other online pharmacy, they all require a prescription from your vet so you wouldn't be able to. |