Answer: When kittens are 4 weeks old, they can be bathed. If your kitten is younger than 4 weeks old, you should only give the baby a bath in the sink so that it’s not traumatized by cold water. You probably won’t see your kitten for at least two more months after this one. Continue to introduce food gradually and allow plenty of time for meals before bathing him or her. Even though you’re just starting out with any new pet, don’t rush things!