Ellie was on Interceptor (my first choice). She did really well on it but the vet noticed it is beef flavored and I think Ellie is allergic.
So, we had to go to Heartgard (the regular...not the beef chew). The regular Heartgard doesn't have Pyrantel in it, so it doesn't protect against intestinal worms. I wouldn't want to give the extra ingredient anyway when Interceptor takes care of it with one active ingredient. I am still bummed that I had to switch her. Hopefully we can switch back someday.