My cat Mason developed chin acne about 3 weeks ago. It started out as a small spot and has now expanded to covering most of his chin:( I took him into the vet on Monday and she put him on antibiotics. I was a bit surprised by this. I just thought she would prescribe ointment to put on his chin. She gave me benzoyl peroxide ointment to put on once a day but so far I haven\'t seen any improvement. I have a feeling it\'s probably from the dry food (he get a little bit of Purina Urinary Health dry and Weruva wet) but she dosen\'t want to take him off of it because of his crystal issue. Has anyone heard of prescribing antibiotics for chin acne? He eats out of a ceramic bowl which I wash daily.