This is one of those things that can only happen in Mainz.
(Not that outrageous things don't happen elsewhere...)
There's a guy on the market who sells eggs.
And in a brilliant piece of marketing, he brings along one of his chooks which lurks around on the stand, lets itself be stroked by one and all and thoroughly enjoys being the centre of attention
So a couple of years back, one of the tubby little bureaucrats who strut self-importantly around the market in their uniforms, making sure that everything complies with their rulebooks and collecting the rent, finds a clause stating that the Mainz market is not a livestock market (Yeah, right..!) and decides that the chook has to go.
You can guess the rest of the story - public outcry, spluttering noises from the bureaucrats, chook stays.
Sanity does rule on occasion....