What worked for me this summer - very stubborn small wounds on white pastern, NOT summer sore (I treated with summer sore meds but it never healed up…) was a zinc oxide cream. I started with Equiderm zinc oxide paste but then went to Coat Defense paste. It stayed on better - didn’t even wash off after the ride when I rinsed him!
You need to call your vet if you’ve tried every OTC product. I have one with white legs that is prone and I use Entederm (generic Panalog) with great results. In winter I have to clip his lower legs, but the Entederm clears it right up.
