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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.
To avoid either issue, you can have your little one neutered or spayed as early as 6 to 8 weeks old. Maturity Once a kitten reaches sexual maturity, usually between 4 and 6 months of age, he is able to produce offspring. This means that your little girl kitten could be giving birth to little kittens well before she's 1 year old. Your kitten's behavior will also change once he or she hits puberty: Male kitties begin to spray smelly urine to mark their territory, and females yowl when in heat.