I have a young, 7 month old RIR hen. She looks healthy, acts healthy, eats normally, and lays every day. However, I have been noticing that her poop is not very normal, and looks exactly like one of the ones from the poop chart (shown below). They get ACV in their water weekly, are vaccinated against cocci, and all act completely normally. Any ideas what this could be? The chart says maybe kidney problems but I have no idea what I'm supposed to do about that.