When my parents' Border Collie, Cooper, was younger we taught him not to bolt out open doors by asking him to wait when the door opened. We would then say "Okay" or "Okay, go!" and he would then go out. As a BC, he made this into a really fun game for himself (and honestly we all used to think it was funny). He'd come in and stand at the door we'd say, "Readyyyyy---GO!" and he'd bolt out. Rinse and repeat. He is now completely obsessed with barking and scratching at the sliding doors pretty much constantly to play this game. Only even if you say, "Okay, go" he doesn't always go. He'll just stand there tensed and ready, but he's frozen. My parents have taken to leaving the door cracked so he can lay half in and half out of the house. This works for them when the weather is nice, but when it's 95 degrees out, it's not exactly economical for them to leave the doors open. Unfortunately he's had a couple years to "practice" this behavior, so I know it will not be a quick or easy fix, but I'm stumped. I've told them that they need to stop using the sliding doors (which are the only doors he plays this "game") for the time being, but that's not entirely practical. Obviously it's completely fine for him to bark at the door if he needs to go out, but they need to find a balance. Any tips on curbing this OCD behavior?