Somebody mentioned turtle shells and it reminded me of an article I read in a bee journal a couple years ago--apparently, they started sealing broken sea turtle shells with a mixture of raw honey & beeswax and found that it aided healing better than any other substance they had tried. Honey is antibiotic and wax, of course, can help hold things together. Just a thought--don't know how well it would work--but I thought it was worth mentioning. Glad he seems to be doing better.