Today, I took Gizmo to the vet for his second set of shots. Well, I asked them about heartworm prevention meds. and they had Heartgard Plus. Since I've read about ones being better than others, and haven't really read about HG, I didn't end up buying it. Has anyone ever had any problems with Heardgard? I was actually wanting to buy Interceptor simply because I see the majority of people on here using it?But since my vet doesn't carry it, does anyone know where else I can get this? I live in Miami, if that helps.