I had 40 almost four week old quails, they were fully feathered so I took them out to the coop. I have chickens, turkeys, ducks geese and guinea fowls all living together. I never had any problem. I took out the quails and when I checked on them I saw a turkey hen killing one, I shooed her away, and then I saw the coop was full of dead quails . I saved 9 quails and found 2 more out of the coop. there should still be few walking around or dead somewhere in my backyard. It's so depressing, never had any problem with them all together, but this is the first time I'm bringing in quails.