My rooster has been having a problem with frostbite on the tips of his comb for the last few months. After this last cold spell, he developed a fingernail-sized blister on the back of his comb. At first it looked like a water blister. I applied 3x antibiotic ointment and massaged it in well, and moved him to a warmer area for the night...but the next morning, the blister was bigger and filled with BRIGHT YELLOW puss! It looks so swollen and painful....and feels harder than a water blister would (I guess maybe because it is so filled with puss, which is thick?) I know this isn't the greatest picture, but hopefully you can at least see what I am talking about... I know that this is related to the frostbite, but is there something I should do for it? Maybe betadine or spray with blue-kote? Or should I just let it do its thing? I know blisters are like nature's band-aid or whatever, but the puss really has me concerned....Any suggestions? Thanks!