My EE is looking really skinny. I see her eat and drink as usual, but she seems off. Her comb is very light, she stopped laying, that is why I thought she was molting, but she hasn't lost any feathers. This morning, I found a soft shell egg on the pooping board. I am pretty sure it is one from her. She is one year old. Her sisters (same age) are very active, laying very well and their comb is bright red. I checked for mites/ lices, but nothing. What can it be?