I had a bunch of goldfish in our garden pond, only the ducklings had access to that. Well one morning I walk outside and see two of my 3 week old muscovy ducklings on the lawn beside the pond, with a goldfish bigger then their heads. They were trying to eat it but didn't quite figure out how to get something that big down their hatches.
Needless to say the fish died in vain, neither managed to eat it but the constant pecking killed it.