We have 2 cats. One would like to get the other urge, what is her during our vacation actually succeeded. The neighbor could not explain why our Nori was no longer to be found at home (she eats otherwise reliably at their regular place to meet). That gave then a whole lot of stress on the cat flap (only do not let the cat flap or back bite in the butt, etc.) As soon as I have given the dominant cat the globules of the stress was over. Although I forget now from time to time give to the globules, and I've never given it 3 times a day but only in the morning and evening. It has still works great. So they go now together by the kitchen door without the sparks fly, etc.