Here's how I solved the drafty door problem:
It's vinyl cut in strips and stapled to a board that gets screwed to the wall. For the first week or so I tucked the center flaps up so they learned how to push through. They learn quick, you just have to keep an eye on them to make sure so one gets stuck outside until they figure it out.

It's vinyl cut in strips and stapled to a board that gets screwed to the wall. For the first week or so I tucked the center flaps up so they learned how to push through. They learn quick, you just have to keep an eye on them to make sure so one gets stuck outside until they figure it out.