sickness? molting?

Hi everybody! My ten month old rouen just started losing feathers, seems like three or more daily. I figured it was only molting until I noticed her poo is like an orange color. Her diet hasn't changed, although since the snow has melted she's been pecking at what looks like moss along the garden. She's also been hunting worms in the backyard. I also know there's a few orangish rocks she's been pecking at but she usually just spits them out... Should I be concerned?