Coonie,
I posted on the other thread as well, but a little more for you. Bandit (110 lb doberman) was 6 years old when he was nuetered because I had to take in his unnuetered sister when she was in full heat and had no way to separate them. I never intended to breed either one of them anyway.
Merlin was nuetered when he was three. He began to get aggressive towards other dogs and was marking his territory- better known as my living room. His incision dehised (split open) two days after the surgery because the vet I went to at that time didn't use stitches, only superglue. It probably worked great on mojos, or puppies, but not on 135 lb Great Danes! I took him to the ER vet and they used staples which worked fine.
In both cases, the swelling was minimal, no greater than that of the sacks before surgery, and never that inflamed. I would definetly call your vet.
Stella