Thank you! The changes around Max's lips appear to reflect a lip fold or mucocutaneous pyoderma. These are addressed as follows:
1) Cleansing wipes (i.e., alcohol-free acne pads, baby wipes, chlorhexidine-containing pledgets, other antimicrobial wipes) used every 12-72 hours work very well.
2) Alternatively, routine topical therapy can be used to control the skin problem. The affected area should be cleaned every 1-3 days as needed with an antibacterial shampoo that contains chlorhexidine, benzoyl peroxide, or ethyl lactate. These shampoos can be found over the counter in pet/feed stores, online, or at Max's vet hospital.
3) Topical application of an antibiotic ointment, solution, or spray every 24 hours for the first 5-7 days of therapy may be helpful. The safe prescription mupirocin ointment is available through Max's vet and should be considered.
The ulcer under his eye isn't consistent with either type of pyoderma but is likely to represent a focal and deep pyoderma best addressed with thorough cleansing as mentioned above plus a systemic antibiotic in the cephalosporin class such as cephalexin administered for 3-4 weeks and 1 week past clinical signs. The cephalexin would need to be prescribed by Max's vet. Please continue our conversation if you wish.