[Cheryl P]

My two-and-a-half-year-old border collie died this past January he develop seizures because of an ingested flea medication. But I have a question when I went to the vet, I asked about putting my dog on a grain-free diet, his reply was that it would be bad for his heart? Anyone know why he would say that? I may get another pup this summer and I want to start him off right. And I still have a five-year-old border collie at home