I'm querying this one other for company thing. When we had a pig that needed isolating for whatever reason we did just that, though they could always see and hear other pigs, but did not share a pen with any.
However on returning to the herd, there would always be that half day of challenges where everyone has to find their place back in the pecking order. I can see though if you took two away, it would mean less attention is all on one pig.
So is it really one other for company, or is it one other to make re-introduction back into the herd easier on the "weaker" pig?
I agree with the above two re the foot though.