Strange Duck Death, Please Reply ASAP

[xdmsd3d]

I agree that mink kill and eat nothing but in my experience they kill everything in the building.
Don't the mink fly under the radar of your motion sensor lights?

My neighbor had them kill one and then a few nites later kill several then the next day one or two. She didnt figure out what it was until she had lost 32 birds.
I have not had a predator attack (besides suspected snake) since I put the lites up. I have them aimed at different angels??