My maran seems sick

[hollyester]

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?

 

[Eggcessive]

Staying on the roost in the morning is definitely a sign that she could be weak or sick. Check her crop to see if it is full, empty, hard or balloon like. Recheck in early AM to see if it has emptied. Look at skins around vent and elsewhere for lice or mites. Feel her breast for loss of weight, and her lower belly for any fullness or lumps. Look at her droppings for anything unusual. Put vitamins with electrolytes for chickens in her water, and try to get her to drink. Offer some chopped egg and feed with water in it to make it wet. Has she been wormed recently?

 

[hollyester]

She hasn't been wormed recently. Upon physical inspection, she seems normal. I'm giving her electrolyte water and soft food and keeping her separate in our "sick chicken box".
Thanks for the suggestions, i'll update you as teh situation progresses.

 

[hollyester]

It's been a while, but I thought I'd update you. We asked some folks that know more than we do about her and they said that it sounded like a bacterial infection (she had black droppings, which seemed to be the giveaway). We attempted to treat her, but started too late I think. We lost her about 5 days after the symptoms started.
I am still watching the rest of the flock to see if they have symptoms, but not one has come down with the same thing, and it has been a few weeks.

Now we know what we are looking for if we come across it again.
Thanks for your help!