The polysporin is fine. Bless you for rescuing him. Just a quick note - if he is still plagued with the ear mites, go to www.revivalanimal.com and order either Cerumite or Mitaclear. These products are a Godsend as you only use them one time and repeat in a week, rather than having to use them daily for 14 or 21 days as with most miticides. They are also VERY inexpensive. Please let me know if I can help further. I will be away from my computer for about an hour if you need additional help, but please don't think I'm ignoring you - I will be back.