Hi guys, I found my Mallard/Pekin mix duck dead this morning. He was only 4 yrs old. I got him a companion last year after his older drake died at the ripe old age of 8. It is a Muscovy Drake. He is much larger than the Mallard Mix but they were getting along. I noticed a little dominance behavior but the Mallard didn't seem to mind, and was not showing any signs of illness. I had to remove their water tank because it was freezing over. My question is, could the Muscovy Drake have crushed the Mallard? He was trying the mating behavior with him, but I don't want to paint my Muscovy as a killer. And should I get him another Muscovy so this won't happen again? I'm just really sad my Mallard is dead, he was a beautiful and lovely duck. I've owned and cared for chickens and ducks since I was 11 yrs old and never saw a duck die of no illness, old age, or predation. I would like to know if you know what might have happened?