Howie calmed down quite a bit after I got him fixed. He started acting more like a dog than a puppy which meant less barking and better obedience.
Just a word of advice, ask your vet for pain meds just in case. Howie needed them and didn't have them and we had to do without. I've never felt so guilty in my whole life. I bundled him up in his blanky and snuggled him on the couch all night. By the next morning he was all better though. You also might want to get a baby onesie so Tyson can't lick his stitches.
I know it's nerve wracking, but your baby will be just fine!!