Hi.. I live in the U.S. and where I live there are zero exotic vets (for guinea Pigs) and my guinea Gus Gus has bumble foot... I’m scared. I don’t want to lose him! I’ve had the sweet baby since March and I have tried epsom salt soak with him... but, his sores are now open.. any antibiotic ointment you would recommend that I could get at the store for him? Cheers- Milly