I just had Chewy at the vet and she told me it is adviseable to do it at 6 months and the only reason she would wait is to see if all his teeth come out. If not they will wait a little extra time because it's not good for too much anesthesia. Chhewy has humped a little, the other day I caught him with my son's monkey

LOL BTW, I hear the laser is good and I think I'm gonna do it.