Using CDs on top of chicken run to deter hawks/eagles

Finally got the chicken run done (this is a picture of it from my upstairs window). The top is covered with heavy duty deer FENCE, not the cheap deer netting used to cover plants. It has a 650 lb. breaking load at 107 pounds per tensile. I have no idea what that means but it sounds impressive! I had it leftover from fencing in my garden since the deer were absolutely relentless about getting into. Anyways, I thought I read somewhere that if you put cds on top of a run the reflection will prevent flying predators from diving into it. However, when I went back to research the topic I couldn't find any information. Not on this site, nor a general google search. Does anyone have any experience with using cds on top of runs? Last evening I looked out at my girls and they were all frozen statues; not even blinking. I opened up the window and tried talking to them and they did not budge. I knew that meant trouble. I ran outside and scared off the massive immature bald eagle that took my neighbor's rooster a few months ago.

 

No trees or shrubs, only back into their coop.