kelly mpls, MN 3/27/2010 9:00:37 PM PLEASE READ THIS. Although many of the comments here are correct, no one has mentioned the dangers associated with giving your dog (or any pet) hydrogen peroxide at home. It is very VERY easy for a dog to aspirate the liquid, that is, for some of the peroxide to go down the trachea into the lungs. This is especially true if your animal is struggling. The pneumonia caused by aspiration can be fatal and untreatable. The best solution is to bring the animal to a licensed vet ASAP, or at least get animal poison control to walk you through the process of inducing vomiting.