Since the winter months came in, strange cats started coming in and freaking out Margot, who is a somewhat dim but sensitive soul. So I ordered a sureflap cat door in order to give her back her sense of territory and security etc. Dh installed it yesterday and neither cat is keen. I popped them outside yesterday before dinnertime and even though it was dark and cold, they only eventually came in when I propped the door open for them. Dh is convinced they're both too dim to get the hang of it (even though he absolutely dotes on the two of them) he's not convinced of their smarts. He may be right 
Does anyone have any suggestions??? please?? I am working so can't spend time coaxing them in during the day but will try again tonight at dinnertime.