My ma used to give our dogs powdered garlic in their foods as a mosquito repellant, and I asked the vet if this was safe. He said on a regular basis, no. Once in a while, like spaghetti sauce or other food scraps that have it in it is fine. My Rottie loves to eat anything, and once she inhaled a whole clove of garlic, but she was fine. She weighs 100 lbs., so maybe her size had something to do with it, but I wouldn't worry.