Depends on the dog, with the rescues they are altered asap. The puppies depending on if they are vWB+ or not, if they are we wait a bit, if not many are done at 8 weeks.

The kittens were done at 6 weeks except for one who was too tiny and will be neutered in april.

When we had show dogs we waited on several of the prospects to see if they were keepers or not. If not they were neutered and found great pet homes.

I would neuter him sooner rather than later simply to halt some male issues that can occur with unaltered males(marking etc.)

Just my thoughts.
Kym