Depends on how "money hungry" the vet is. Some will not sell it without actually seeing your hedgehog and verifying they have mites. You are better off calling and telling them you want to purchase it to start treating your dog. They will be more likely to sell it, without an appointment. I had to call 6 different vets, to find one that would sell it to me, without a vet visit. They said they could sell the other brands (with ivermectin) without a visit, but not the Revolution b/c it's so "potent". But this last time I needed it, I didn't have any problems getting it. So I don't know if they have relaxed their "rules" on selling it, if I just got lucky this time, or what. But I've heard similar stories from other people as well. Sometimes it's easy to get, and others times it's nearly impossible. GOOD LUCK!