Gold Bar Park, Edmonton, AB, Canada.
7D | 300/2.8L + 2x | 1/1250 sec., f/7.1, ISO 400; handheld.
Four photos to summarize most of the feeding actions, and the sequence is posted in the comment box below. It took about 30 minutes to finish 80% of the mallard. This Eagle flew off afterward, and the second Eagle picked up the leftovers right away.