When you leave, your dog wants to know everything is okay.

The key here is immediacy - give the good thing, and then walk out the door immediately.

For my dogs, this is a treat, and I walk out while theyre distracted with chewing.

So the next time youre headed out, give your dog some positive reinforcement and make your way out.

Other things like chew toys and turning the TV on for background noise might help as well.