I tried putting hydrogen peroxide in my dog's water bowl for her very foul breath - guessing gums/tooth decay, but she has been very sick too. Anyway, I tried it and she threw up about 4 minutes later. Then I read how to make a dog throw up is to give them hydrogen peroxide? so I am confused and won't be using that anymore. Also- do NOT use it Full Strength on the gums!! Will burn!!