today will be the 2 week mark. it looks as if it healed nicely. but where is sack should be shriveling up it looks like hes got something hard in it. is it possible they forgot one when they nurtured him?
Could just be scar tissue. Give the vet who did the procedure a call and ask about it.
I've seen this before. It takes a while, about a month, for the sack to recede.