They wandered onto his land and he decided to enlist his readers' help in finding out where they came from in an amusing post.
So far, so good.
Then his readers started commenting.
It took, oooh, three posts for the first Welsh sheepshagger joke to surface. Are they, this wit inquired, Welsh asylum seekers.
"They probably originated in Wales, then were dumped after some Welsh person had his wicked..........sorry, forgot where I was for a moment :)" said another.
The smiley face makes it ok, of course. And almost inevitably one compared the find to a Welsh leisure centre.
If you are going to make sheepshagger jokes about the Welsh, and I know it's an instinctive thing with a very few English people - it's almost like the word Welsh triggers something deep within the hypothalamus (look it up Dale Diary posters) and as soon as they hear the word Welsh, they cannot restrain the word 'sheepshagger' from popping out unbidden - then at least try to make them original and...um, how to put this...funny.
But be warned that this is what you'll get if the Tories gain power at the next election. For all the 'call me Dave' mateyness of Cameron, the legion of gofers and hangers-on that will come with them have a default setting of knuckle-dragging idiocy.
For every sane and seemingly rational, photogenic candidate they put up for election, there is a tide of braying idiots behind them that David Cameron has managed to persuade the party to keep in the backroom at least until they're in power.
Unfortunately they break loose now and again and post comments on websites like Dale's Diary and they give you an inkling of what Cameron's Britain will be like - imagine living in the Daily Mail.
Take David Jones MP, for example, smart, acerbic and writes a very good blog, but then you get to the comments section and you cannot help but think, dear God, how does he put up with such roaring buffoons?
Unfortunately, if they win the election we'll have to put up with them too.