VAT inspector tried to catch me out on that one. Very devious she was too! I think I posted the story about it on here some years ago (which is perhaps the example you're thinking of?)
Fortunately, I was able to show in my accounts that I had indeed recorded everything properly, and had charged VAT on all dogs and puppies that I had sold over the preceeding five years.
But she was definitely out to try and trip me up over it, by using the "Jeckyll & Hyde" method.
Edit: Here's what I posted before:
On the subject of VAT, I recall once having a VAT inspection. The inspector was a gushing, blousy kind of woman, and I thought it would be a pushover. She was going gooey-gaga over a litter of Jack Russell puppies that were squalling around our kitchen at the time, and I thought I near enough had her eating out of my hand. Thought I had a customer for a puppy! She remarked that her children really wanted a collie puppy, not a Jack Russell, and she'd seen my sheepdogs on the yard, and did I ever have collie pups for sale? Yes, I told her, sometimes.
Entering the farm office, Jekyll became...