This chick is almost 6 weeks old. She is 3 times the size of the other chicks that are the same age . However she is the only one of this breed. She spends most her time sitting down. She doesn't move around much and it looks like she's molting. She's loosing feathers around her butt and under her wings but she is way too young to be molting right? I've posted a picture you can see she looks a little rough. Any advice would be great!