Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 15 years of experience. I look forward to working with you.
This could be related to healing trauma, but most injuries to the lips/mouth from a chew item would heal rapidly (within 10-14 days maximum). Since this sounds like it has persisted well beyond that time, it either may be infected or has absolutely nothing to do with the rawhide. Instead this could be lip fold dermatitis (infection of the lower lip fold region which can be related to an underlying allergy or the anatomical conformation of the area) or immune-mediated disease. Those two problems will need to be addressed by your vet with some testing (skin scraping or tape prep test for cytology and then appropriate prescription medication to clear).
What could you try in the meantime now that the weekend is upon us? If this was my patient and you were unable to get her in to be seen right away, I might recommend cleansing the area once to twice daily with a diluted betadine concentration (1 part water to 1 part betadine); you can purchase this at any pharmacy. And then trying treating for bacterial infection by use of a topical triple antibiotic ointment as made for people. The problem with topical treatment is that she is going to lick it off. Perhaps, if you do this treatment before you feed her she will not be as obsessed about licking it off, and more focused on eating, although she is going to lick it off. You can apply this ointment 2 to 4 times daily (given that she is going to lick it off; and it is safe to be licked off if you get an ointment that is neomycin/polymyxin/bacitracin).
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Hi Dr Joey,
Many thanks for your expert reply.
Since posting the question, we cleaned the area in question to see if any blood was present. There was no blood on the cotton ball and Molly did not appear to be agitated at the touch. We think now that skin is present after looking at it closely, but the fur hasn't grown back yet.
We've attached a photo for your review.