Graeme Hall reckons German Shepherd Marvel was the most reactive dog he’s ever worked with. He lunged and barked at absolutely everything, both indoors and out. He met Marvel and owner Lorna for TV’s Dogs Behaving Very Badly, and now catches up with Lorna to find out whether the training he showed them has been fruitful.

The Dogfather also explains why it’s so important to understand why your dog is reacting in the first place in order to train them out of it in the best way.

Do you have a question for The Dogfather? Send Graeme a voice note and a video of your pesky pooch to [email protected].