Does "was chewing on the ear of a third" mean "(Sow 44733) was chewing on the ear of a third"?

And "sported abrasions" means "had abrasions"?

Context:

ELDRIDGE, Iowa Sow 44733 had broken the shoulder of one of her pen mates, rousted another who was huddled in the corner and was chewing on the ear of a third.
Other sows in the pen sported abrasions, torn ears and bloody tail stumps all souvenirs of her attentions.