One of my cats knows how to use a litter box but has seemed to make a habit of peeing and pooing on my kitchen counters. I believe she's doing this as my other cats have a habit of chasing her from the litter box. What can I do to pervent this from happening?
First off, always keep the litter box clean.
The other cats must think she doesn't belong to the pack, you should let them interact more, let them play and know each other best. If the problem continues you can place another litter box only for her.