Re: Please help. Mouth sores
Water based antibiotic cream is fine, excessive use of anything oil based can do some damage.
Re: Please help. Mouth sores
Some Pet Stores will sell a product called Vetericyn. It's 100%, not anti-biotic, no painkiller, developed for animals. It oxygenates the wound/ sore and helps feed the white blood cells trying to heal or fight bacteria. It's safe enough to spray on the inside of pets' mouths even (though I wouldn't suggest it) and safe for humans even. If you can get your hands on it, It's incredible stuff.