I lost my first chicken...

I knew this day would come. Tutu just never woke up this morning. She was only a year old :( The rest of the flock seem fine. She seemed fine. There were no mites, no wounds, she was a healthy size and weight and a regular layer. My only guesses are that she got into something that she wasn't supposed to or had an underlying condition. I'm just sad and now really nervous checking on them in the morning. RIP Tutu... you were a good bird.