My maran is about 2 years old. Yesterday I noticed she had her beak open and wasn't interested in anything except sitting there. She ate a tiny bit yesterday morning and last night she roosted up high in the coop like normal, but wouldn't come out of the coop with the others this morning...she was just hanging out on her roost. I put her out near the food and water. This morning she seems much less interested in food/water. I'm pretty sure she laid an egg yesterday. I think she was vaccinated as a chick. What should I be looking for/at?