I made a fatal error with my young chickens and now my 3 month old beautiful, Polish pullet paid the price. I hope others learn from my poor judgement. My mistake...feeding layer formulated chicken feed too soon. I do start my chicks on Starter Feed, but they started getting into the adult feed a few weeks ago, and I didn't heed the warning that the calcium was too much for their body to handle. In the previous years, my chicks had gotten some of the adult feed and they turned out just fine. Well, yesterday morning, I found my sweet girl dead. I took her in for a necropsy study and the lab stated that it was kidney failure. She gently asked me about the type of feed I provide. She then told me that too much calcium in their diet can lead to kidney failure. Some chickens are not bothered by the excess calcium, but my one girl was. I am so worried now about the other pullet now. I don't know if it's too late for her. I feel sick that I did this.