Hi, I don't know what it is but kids just can't keep away from the dog bowls! A gate wasn't an option for us, so we kept moving the bowl up, but then our daughter would get a chair or reach for it and our dog was getting so confused, its frustrating. Now are daughter is 2 1/2 and she helps feed him, she scoops out the dry food and spoons in the wet and then takes it to him, shes very proud of this and loves her dog brother so much but even now she will dip her hands in the water to clean them or put one of her balls in his bowl from time to time so it doesn't end at least not right away. Have a sense of humor w/this is the only way I've found! M.