If you work a 9-to-5 job, a single will become destructive or depressed. "Single kitten syndrome" results in biting, aggression, and anxiety. Shelters highly recommend adopting a bonded pair. Two kittens are actually less work than one, because they entertain each other and learn bite inhibition (when they bite too hard, the other kitten screams and stops playing).
Meet [Name], the adorable baby kitten who's stealing hearts left and right! baby kxtten new