Hello there Akiko! I do think your notion of obtaining a single unit and see first if they all get used to the Litter Robot it’s a great strategy. Then, if you see them all making use of it, you can purchase a second one. 1 one unit gained’t be https://applaws-cat-food22119.mybuzzblog.com/16769484/a-simple-key-for-automatic-litter-box-unveiled