If you’re a dog owner you may have heard about a new year-long flea and tick injection being offered at veterinary clinics. The product, Bravecto Quantum, is designed to protect dogs from fleas and ticks for up to 12 months with a single shot. On the surface, that may sound convenient. But there’s a much more important question that isn’t being talked about enough: What happens if your dog has a reaction—and you can’t stop it? A Drug Class That Already Carries Warnings This i