Well done Michael, I would never have got it. I don't follow the horses. Speaking of horses, I find it rather odd that we have at least two abattoirs in Australia that kill horses for human consumption but the meat product is all exported - it seems we are not allowed to access the product. We are a country of oddball rules.
To your riddle - an oldie but a goodie - You can beat an egg, but you can't beat a ....