A little advice ...
Chong my little boy has been so upset trying to get to the girls I've made the descision to get him neutered. He's going to a specialist exotic vets on Wednesday and I'm really upset about it. I hope it all works out well but I know the risks are fairly big. You have to wish him lots of luck.
CAUTION: Chinchillas having had surgery or a broken limb, is much like any other animal ... if it itches, burns or hurts (as most wounds will) they will try to chew off the cast or the stitches that are sticking him, or the scab as it heals, because as it heals, it draws/tightens and hurts the tender area.
As it heals and/or they feel a little better, they can become more active ... bump the injured area ... and due to the unexpected pain, loose their balance or footing and fall off of, or on to, a hard object in their regular cage that can cause additional damage ... even worse than the original injury.
It is best to put them in a very small single level cage that is confining ... and give him extra closely supervised free time ... at least until they are almost completely healed. Below is a cage I use as a recovery/isolation cage when one has been injured. This is small and confining, but safe. The cage below is 18" wide 12" deep and 15" tall. It is setting in a wooden service tray ... lined with a plastic cutting bord sheet and covered with several layers of paper, to protect the tray.
Often, a collar is needed to keep a little one from chewing at the incision. If this is needed ... you may need to plan on hand feeding your little one ... this gives them special individual attention and comforts them.
{I believe Debbie has a pattern for the collar.}
Keep us posted!
Jo Ann