If all else fails try getting a culture done on the affected areas, see if there's a fungal infection or something.
I'm almost positive it's contact dermatitis or the vitamins. Follow the suggestions above and you'll at the very least make him more comfortable, less irritants and the raw areas will be kept clean.
I'm almost positive it's contact dermatitis or the vitamins. Follow the suggestions above and you'll at the very least make him more comfortable, less irritants and the raw areas will be kept clean.