For the snake....... I am not seeing any damage rodent related. Looks more to me like either a dehydrated or stuck old eye cap.
As far as the "f/t is a safe method" comments, has anyone see what happens when you didn't make their meal correct and it is still partially frozen?
Care for a huge collection of snakes is easy. Ball pythons are not really as hands on type of pet, just because they tolerate it doesnt mean they like it.
Care for a huge rodent colony sucks, I don't have time for mine anymore and this is the only reason I am switching to f/t.