cheilitis

Anybody have experience treating cheilitis? My pig has had it for over a month with scabbing/crusting all over her lips with occasional lumps. My vet treated her with antibiotics (SMZ-TMP) and a topical (silver sulfadiazine) for weeks now with no improvement. They also recommended to...

My guinea pig, Milky has dry, scabby areas around his mouth. He is 5 and approaching 6 years old. He is housed with another piggy, who has no similar signs. Is this Cheilitis? Should I go to the vet? Is there any way I can treat it?