Henry the Maltese is reactive ( barking, growling and lunging) to strangers who approach the car. His owner reports he is particularly bad in the drive-though, so off we go for a field trip! I use positive reinforcement to teach him a calm, competing behavior.
Note– We had previously worked on a calm “Down Stay” on the mat that you see on the passenger seat, but ideally I would have also put in some work on doing the Stay while the car was moving. We had a bit of “criteria pileup” so that 1) the trainer is repeating cues — Naughty! and 2) Henry goes over threshold for a second and barks. He recovers nicely though, and is relaxed while we finish our drive through run.