A dog handler's income sources may vary, here are some common ones:

Participating in dog shows Competitions: Dog handlers can earn prizes and awards by participating in various dog show competitions. In some high-level dog shows, the winning handler may receive generous bonuses or prizes.

Dog Breeding: Some handlers may also be engaged in dog breeding. They can earn income by selling puppies or providing breeding services.

Training and Mentoring: Dog handlers may receive compensation for providing dog training and mentoring services and helping other dog owners train their dogs.

Business cooperation: Some dog handlers may cooperate with pet product companies or advertisers to participate in advertising, product promotion and other activities, and receive sponsorship or remuneration.

Professional services: Dog handlers may earn income by providing professional dog evaluations, purchasing advice, grooming services, etc.