Not an expert but the one on the right hand side looks like it's no good and the white fuzzy thing on the other one should be wiped off. May be fungus/mold. What are you incubating on? Maybe the humidity is too high?
Someone else will come along and help more than I can.
I guess I would not give my redfoot chicken bones because of the fear of his choking on it. He eats eggshells (with the boiled egg) and occasional small snails, slugs and he has his cuttlebone and repti-calcium powder. Besides, I would be depriving my rats of their favorite food:D in the whole...
Play sand? Real sand? what's the difference, they are both not good. Believe me, the folks here who are advising you know their tortoise stuff. They really care and want to help and I for one am so very glad I came here for help over three years ago!
He needs some fixing up with regard to the early pyramiding. Make sure you check out the correct humidity levels and the temperatures for this species. He seems to have been kept too dry to start. Daily warm water soaks (supervised) will do him good and help prevent further pyramiding.