hello, where I come from , only one vet accepted to neuter at 4 months old, they believe that it isn't a good idea to neuter under the age of 6 months, is it true? I want to neuter my male kittens before they reach sexual maturity, to avoid urine spraying. also, would they still spray urine even if they got neutered before reaching maturity? how about female kittens, is it okay to spay them at 4 months as well? thank you