Heaven preserve us from self-appointed “experts”

Yesterday evening I went out for a drink with an old friend. As always in these situations I had with me my guide dog Trigger. On my friend going to the bar to get some much needed liquid refreshment, a gentleman on the table adjacent to mine said words to the effect of,
“Can I feed your dog?”
“No thank you, he gets two meals a day and feeding him encourages begging”, I replied.
“But he’s hungry”, came the response.
“He’s always hungry, that is the nature of dogs”, I said starting to feel exa...