However, despite its success, the 49-year-old believes it will come to an end when viewers get bored of watching them.
He explained: “Things change over time. I mean I never ever thought that we would be doing a 13th series.
“I don’t know really. I imagine at some point, the channel will say, ‘you know enough is enough,’ or the viewers will eventually get fed up with watching us do our stuff.
“Other people will come along. There are plenty of vets around in Yorkshire and in other parts of the country that are much more skilful than me and much more eloquent and probably much better looking as well.”
The Yorkshire Vet airs on Tuesday at 8pm on Channel 5.