There Best Cat Litter Boxes are only a few negative things that can be said about the Litter-Robot. One is that the Litter-Robot II is not recommended for tiny kittens or cats less than five pounds. Tiny kittens and very small cats may not set off the cat sensor and could get hurt by the trap door. Second, it is not recommended for diabetic cats since urine clumps may be too large. Third, it is not…