how many pigs is it legal to have on a french large farm?

Answer 1

I give up! But I did find the following (so the number is huge):"The intensive pig farms of Brittany, which resemble small chemicals factories, generate so much pork that French and European market prices are constantly on the verge of collapse. They produce so much pig effluent that one third of the water-courses in Brittany are poisonous to drink."