But do we know the legs were removed before they died, not after?
And why the right one?
Ahh, good point about before or after death (they should be able to tell) but assuming it was to stop the little trotters from trotting too far, I reckon you'd be sitting astride the poor fella (who'd be on his tum) and you'd both be facing forward. The front right leg would then be the easiest to... emm... 'detach' :-(