How old is to old to have my male fixed?

Any age but when they are puppies is best

The sooner you can get them fixed. However, you can have it done at any age.

Doesn't matter age as long as they are a certain weight, which I think is 2 lbs

The age doesn't matter much as far as getting fixed, but senior dogs are at higher risk when they're put under anesthesia so it's best to do it when they're young. I would ask your vet

I would think he could be fixed at any age. Usually less expensive when they are pups.