There are a number of reasons a dog can seem to chase, including things as diverse as fear, territorial behaviour and social interactions. Solutions need to be tailored to suit each one. Predatory Chase include instances such as running after cars. The first step therefore is to scan your dog’s environment for anxiety; take out as many challenges as possible and introduce as many emotional improvers as you can. Prevent the dog from continuing to reinforce the unwanted behaviour by changing the target and coming up with a predictive command that the dog responds to.