Only for small cats
It works for my smaller than average cat but would be too small for normal size cats.
I use it indoors to feed my cats separately. The cat was afraid of it at first and needed a lot of coaxing. I cut the hole in the door and would put her in the room so she would have to come through the hole to get out. After a few days, I installed the SureFlap and taped the flap open. Then in another few days, I taped the flap so that it just hung open a crack and the cat could put her paw through first and see that she could push the flap open (it takes a little pressure to open the flap when it's completely closed). In another few days, she was using the SureFlap with no help.
Verified purchase: YesCondition: Pre-owned