For more than twenty-five years, I have worked with dogs and their owners to understand and improve a wide range of behavioural problems.

My work has taken me into thousands of homes and given me the opportunity to work with dogs of different breeds, backgrounds, personalities and behavioural challenges.

I am the author of The Dog Guardian and I'll Protect You, and my dog behaviour videos have been watched more than 10 million times on YouTube. I am also a judge on UKTV's Wagging Rights.

My aim is to make dog behaviour easier to understand and give owners practical guidance they can apply in everyday life.