Which preposition to use with porkers

on Occurrences 1%

Morgante then placed the tub full of water upon one of his shoulders, and the two porkers on the other, and returned to the abbey which was at some distance, without spilling a drop.

to Occurrences 1%

"Pooh!" says Hertford, "send in your porker to my man, and he'll do it for you à merveille."

under Occurrences 1%

The Countryman, meanwhile, before going on the stage, had secreted a young porker under his smock; and when the spectators derisively bade him do better if he could, he gave it a pinch in the ear and made it squeal loudly.

Which preposition to use with  porkers