My grandad (a meat buyer and butcher by trade) always had three or four pigs on the go, but all swill fed, collected free from the local cafes and dept store restaraunts, my mum still has knives and forks from Busbys Dept store cafe in Bradford! when he retired as a meat buyer and inspector he went self employed and opened a butchers shop in Laisterdyke! In the late fifties he had to be off for a week for a minor op on his leg, and my mum and dad ran the shop for a week, they swilled out the shop, paid the meat bill, paid the landlord (Jack Tordoff aka JCT 600) and still had £140 left over, when they told grandad he said "Nay lad leave us a bit o summat" that was his weeks profit!