Tim M, believe me the thought of taking animals to the abattoir is far worse than the actual deed! You could get a neighbouring smallholder/farmer to do the deed for you. They will know exactly what to do and take all the pressure off you.
I couldn't eat meat unless I had reared it myself or knew where it had come from.
I have nothing against keeping pigs (or any farm animal) as a pet ,they can become very dear to you but you know that most folk buy weaners for meat.
Were you nearer I wouldn't mind one of your Meershams to keep my old sow company!