FWIW, I own a Jack Russel that had a reaction to Proheart that was transient. I gave her a steroid and then after six months we went back to heartgard. My personal experience with Proheart made me advise against using Proheart with Jack Russels, Pugs, Boston Terriers and Chihuahuas.I think Proheart is excellent in large breed dogs that are not over 8 years old or debilitated with preexisting disease. Proheart will take some tinkering to make it safer for dogs but after working with the Fort Dodge veterinarians in research and professional support, many of the adverse reactions to moxidectin were new and totally unexpected and after studies on the efficiency of the drug was thoroughly studied.
Thanks for your reply. No more heartworm shots for Buddy.
I learn a lot on Free Republic.