This is so true!
When we had Geoff the puppy living with us Rob very patiently taught him how to use the dog door. He jumped in and out a few times and then poked a toy through the hole from outside. After Rob waggled it to get his attention, he’d pull it through, as if to say, “come on, Mr. toy can make through the door and so can you.” It was so cute!
This was repeated until Geoff finally stuck his head through on his own but he wasn’t too sure about pushing out through the flap. Our dog door is installed kind of high since it was originally placed for Freya who was a tall German Shepherd and the pup’s legs weren’t that long but Rob barked and ran in circles until Geoff just couldn’t stand it anymore and finally jumped the rest of the way through. Soon he was flying through the dog door as if he’d been doing it forever.