And in Italy is strictly forbidden to slaughter work-horses for human consumption, though sometimes they crack down on an illegal butchery in Sicily, in the north you should be fairly safe.
Within a 30 mile radius of Parma, you can sample some of the best fruits and vegetables, stuffed pastas (ravioli), Parmesan cheese, balsamic vinegar, wine, and sausages in the world -- almost unbelievably cheaply! If you're looking for pesto di cavallo in particular, there's a great sandwich shop in Parma called Pepèn that I'd suggest.
If you happen to go there, know that the best pesto di cavallo shop is the one at the beginning of Via Emilia Est, just off the square to the right.
It's a tiny place, always choc full - you would probably recognise it by the queue spilling out on the pavement.
They only do pesto di cavallo, offering different varieties and even ready made pesto di cavallo tacos!