After each feeding the kittens should be stimulated to urinate and defecate. Moisten a cotton ball, tissue, or soft cloth with warm water and gently but vigorously massage the anogenital area.
If the area becomes red and inflamed, a little Vaseline can be applied to the area.
If the genitilia is hard and starting to look white there may be an infection that may require antibiotics. See your veterinarian.
It is important to keep the genital area as clean as possible, this may be done by running warm water and placing their rear ends under the water. Make sure you dry them as much as possible to prevent chilling.
Nursing kittens’ stools are normally firm (not hard) and yellow.
A litter pan should be placed in the container with the kittens at three weeks of age. They probably won’t use it right away, but they will learn to use it fairly quickly.