I recently took my guy to the groomers. When I dropped him off I explained that he had a spot under his chin that he kept scratching and opening up. She said it could be acne which is caused by giving him water in a plastic bowl. I've never heard that plastic bowls could cause such a thing. Should I change to glass water bowls? BTW: His chin is fine and fully healed. No Acne from what I can see.