Hot Rod was 6 1/2 mos when he was neutered. He also had 14 teeth removed. We didn't get any pain meds, and I wished that I would have insisted on them.
He was kinda out of it for about 3 days. Best of luck with your little one. I have soft collars if you might be interested in that. Click on my link in my signature and feel free to pm with any questions.
Best of luck with your little one. I'll be sending good thoughts and prayers. Please let us know how he is doing.