I am sorry for your loss! I don't know what may have done that. It is sad that Polish have been bred to not see very well due to the large crest, and Polish have been known to attract hawks to your backyard. A hawk knows which birds are more vulnerable than the rest.Oh dear! That's not good, we have not had a problem with sky predators, thank God. But we did recently loose a bird to something..... it's neck got ripped out, but the whole hen got left behind (maybe scared off?) it was likely during light hours. It's the first one in almost a year we've lost to a predator. I will definitely consider getting a few more Polish and possibly putting them in a separate area.