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While spaying is traditionally recommended for kitties between 4 and 6 months of age, spaying as young as 8 weeks old is considered safe, according to Cat Channel. Many animal shelters actually spay kitties prior to adopting them out at this age.
Kittens should be spayed and neutered before they reach sexual maturity, whicâ¦h happens around 6 months old. The average age of spaying/neutering is about 4 months, but it can  be done as soon as 8 weeks, while some vets suggest to wait until  the kitten is 6 months old.