The gator preferred dog meat to duck meat?
We have ducks in our pond all the time, and occasionally a good 5 or 6 foot alligator.
....No ducks eaten around here!
"preference" probably doesn't play a big role in the workings of a reptilian brain. More like: "big splash, warm thing, moving, crunch, gulp, wait, maybe more coming". The thought processes are likely the same whether it's a duck, a dog, or a toddler, so screw PETA and the EPA and shoot the damn lizard.
Must have been a Korean alligator.