This is a common question. We have all heard this..but there is NO scientific backing to this. Go check out Vegas. @KMARINO..He was neutered at 4 months..and a bigger head isn't possible! I asked my vet and she said.."I will do whatever you want, but that's a falsehood". Jake was neutered at 10 months..his head is still growing and he is
2 1/2....Rest Easy..he will be a happy healthier Bully!
DO make sure your vet uses Isoflourane gas...safest anesthesia for your guy.