Struggling to find the name of this Children's TV show about a lad who turned into a dog.

It used to show on BBC I think and I'm pretty sure it was paired with Bernard's Watch. It was about this boy who could turn into a dog but needed water sprayed on him to turn back into a boy. Every single time I've tried to explain the premise of the show to other people they think I've had a fever dream or something and made it all up but I'm SURE it existed.

I know it'll be so obscure there'll be no way to ever watch it either, but I just want to prove that I've not gone crazy.