So - I know it's not "my yard" and the only thing I can come up with, is the layer feed had too much calcium and killed my roosters. A friend raised a batch of chickens. Gave us half, we ended up with 4 roosters. One by one, my roosters all died. Except 1. I'm going to be switching their feed out to a regular mixed-flock style feed, to try to cut down on the calcium, and just try to hand-feed the 4 hens separately some calcium a few times a week. I also mix Diatomaceous Earth food grade a couple times a week to help reduce worms and all of that fun stuff, per the recommendation of local farmers who've been doing this a long time. (our goats get that mixed into their grain too, as do the horses and other animals.) anyways - my friends roosters all dropped dead 1 by 1 too, after starting the layer feed in june (around 15 weeks) per the recommendation of the feed store. When she gave them to us, we kept feeding them based on what she'd been giving them, not realizing that it was probably too much for the roosters. For those of you who have roosters in your flock and layers, how do you get the extra calcium to the girls, with out over loading your roosters? My daughter is really upset that the only Rooster that's still alive, is the one that seems to hate people. LOL (figures he's too onery to die on her.) We are raising a batch of easter eggers now, and going to be building a second coop - since I only got 2 roosters, and 6 hens, I'd like to avoid making the same mistakes I made with the adult batch we were given too.