Hi, I had the same problem with my cat and fortunately we found the solution of this problem. We had recently moved to a new house so we all thought it mightbe stress but she didnīt seem stressed and we pained ourselves with this problem...new house..new furniture...etc I am sure you can see the picture.
Finely we found out that I had used a new brand of sand for the litterbox so I set 2 litterboxes ready and bought 3 or 4 diffferent brands of sand untill we found out what my
Peewee preferred. Now the problem is solved and everybody is happy because we too thought about finding a new home for her.