I've had Sheep, Goats, Chicken and Turkeys. Done the whole thing myself, from bottle feed to freezer. Can't bring myself to do Pigs, too intelligent and I think I'd get too attached to them.
I took my Sheep to the abattoir once ( horrible places), they had a power cut, I had to drag the sheep out of the van ( they knew something weren't right) and put them in a pen whilst I did the paper work and they sorted the power out. When I came back to the van which was parked near the pen where I had left them, they started to call to me, it proper choked me up I nearly put them back in the van an