chickens and chopped clover

I just got hired on to help with an ag project on 3k acre farm. We laid out a 2 acre plot with 1/2 acre being clover as a cover crop. They are raising 100 chickens for egg production using garden scraps. What concerned me was they planned on cutting the clover then throwing it in the run. I know cut clover is dangerous for humans horses and rabbits what about chickens? Is it safe once it starts fermenting?

I have chopped clover and fed it to my chickens with no problems. However, I don't think it has ever made up more than 10% of their ration.