Write the next sentence in the following story.

How to use an automated litter box
Check instructions for age requirements.
Some self-cleaning litter boxes are only safe for cats of a certain age. Often, your kitten must be at least six months old.
Check the instructions on your model to see if the litter box is safe for your cat. Automatic litter boxes can also be dangerous for extremely elderly or handicapped cats that would have trouble getting in and out of the box.