Yeah all the meds are on the list! But I talked to the breeder. Mom-dog (dame) is a mutant/mutant but did great with Interceptor, so we will purchase that brand. She says now as an adult they use shots, but I have no idea what shots there are against heartworm (must be sort of like a 3 months medicine shot or so).Here is the list of known problem drugs from the WSU website: http://www.vetmed.wsu.edu/depts-VCPL/drugs.aspx
Ivermectin, selamectin, milbemycin, and moxidectin are the relevant drugs for heartworm prevention.