Doors seem to be high voltage issues for so many people with dogs. You answer the door, and your puppy bolts through and greets whomever is on the other side. You want to pop out to the driveway and hand something to your neighbour who is passing by and the door doesn’t latch and your dog is now running down the street and out of control.

Reinforcers and rewards can be powerful tools, but get them wrong and you can get very tangled up. I see a lot of newer trainers want to use only one type of treat, or only bring a tiny amount of good stuff and expect their dog to work for the lowest value items. This is what I think of as the cardboard fallacy.