I was reading in Gail Damerow's Story's Guide to Raising Chickens about using wires strung at 7 foot high, with old CDs hanging from it to deter hawks and such. I was wondering if anyone has tried something like this successfully for ducks? Our larger run has no covering and am increasingly concerned about predators from above. Wondering how my ducks would adjust to little silver things hanging above their heads (lots of "ducky looks") and whether it would be effective.