I dont know if he did or not. I only had him for about 2-3 months after I got him from the pet store (which I will never do again). He went in for a check up at the Vet's office and they told me that he needed to get a heart worm preventative and a shot or two. I said well, ok... you're the vet.. what they hell do I KNOW? So they did and a month later, he died. Now mind you, when he started getting sick right afterward, I called the vet. I told them that he had diareah and was crying and yelping alot. She gave me some anti-diareah pills or something to give to him in his food. It didn't help. Before I could call back, we woke up one morning to find him deceased in his doghouse outside, with blood coming from his nose and ears. Seems to me like he had a hemmorage of some sort, but I'm not a doctor. We asked the neighbors if they saw anything or knew what happened? We fed him and played with him that afternoon before going to bed in the evening and he was fine. The neighbor said the same thing. He said "he was just barking and running around yesterday afternoon." Which was when we had seen him last too. He had already stiffened and since we were already heartbroken, we just decided to bury him then and there. I called the vet to b**** at them, but they said it wasn't their fault and it may have been something underlying from before I took him home from the pet store.
I spoke to several people that lost their dogs at that time, they also said that before their pets had died also, their vets had given them Proheart. Their animals (all different breeds) had died within 30 days of being given the medication. They sent a letter to the FDA to complain about the problem. I dont know what ever happened with it, I'm assuming probably nothing.