Looks like a raccoon got one of my birds. I had some 6 and 7 week old birds that were too small for the big pen outside in a smaller cage. They were just small enough to squeeze through the wire of the big pen and I was gonna wait another week and try again. The cage I had them in was a large dog crate with small bars they couldn't squeeze through. I had some seramas, an OEGB and a SL Polish in there. This morning when I went to check on them there were only seramas. The other 2 were gone. Upon closer inspecion I saw a square of the cage where a bunch of black feathers were stuck to the bars and there were a few black feathers on the outside of this spot of the cage. They were clearly the feathers from the polish. I couldn't find any bodies or anyore feathers anywhere. I know there aren't any stray cats in this neighborhood either. Sounds like a Raccoon to me.