When is my kitten old enough to use the litter on his/her own?
Kittens quickly become toddlers. Your kitten's eyes should
be fully open by the time the kitten is ten days old. After three or
four weeks your kitten should be somewhat mobile as well as being able
to eat more solid kitten foods. Your kitten should be ready to use the
litter box immediately—actually, as soon as it can walk to the
litter box. You will have to guide and encourage the kitten to use the
litter box, but after about two weeks a kitten should already be litter
trained. It is very easy to litter-train a kitten.