I bought this for my rabbit.  She is sick and old, and was having a hard time hopping into her other litter box.  This one has lower sides, but still high enough to contain everything.  I only gave it 4 stars because the picture shows the low entry on the side, which is what I needed - but it’s not on the side on the smaller litter pan.  On the small one, the entry is on the end of the pan, which doesn’t work for my rabbit’s hutch.