I think pet meds and vaccinations cause a lot of problems. I've learned that cancer is the # 1 killer of dogs in America, (not old age, not car accidents...cancer). Why is that? Dogs, such stout animals, are great natural healers. So why all of a sudden all this cancer and kidney trouble in the wealthiest country of the world? We're bombarded with commercials on TV, at the Vets office, etc...