I have a buff Orpington who is about 26-27 weeks old, and has been laying since 23 weeks.
A few weeks ago at around 1pm I went out to clean the coop and didn't realize she was inside in a nesting box. I was making a lot of noise, so i figured I startled her. she growled at me, and wouldn't leave the nesting box all day. Once the sun went down I went to check on her, and she still hadn't moved. I picked her up and put her on the roosting bars. She had not laid an egg. The next day I noticed she was growling at noises (I hadn't heard her growl before this incident). She also did not lay an egg that day. Finally after 2 days without an egg she laid a slightly deformed egg (It was fine inside).
I was out of town last week, and my wife Jessica was taking care of the chickens. 3 days ago she noticed the same pullet camping out in the nesting box. The next morning when Jessica checked on them, the Orpington had not moved from the nesting box. Jessica picked her up to make sure she was warm. She was warm, but had not laid and remained in the nesting box until I checked on her this morning. When I opened the coop she growled, and fluffed up (also have not seen her fluff up for extended periods of time) I picked her up, tried to calm her and get her to eat. She was very hungry. At that point (all at once) she pooped about as much as a 50lb dog would poop.
I had to go to work after that, and I returned around noon to check on her, and she had plopped herself right back into the nesting box showing the same behavior.
Her comb is bright red, and her vent was clean.
Any suggestions would be greatly appreciated. Not sure if this is normal behavior or not. These are our first chickens. 2 Rhode Island reds 1 Easter egger 1 Cochin and 1 Orpington. Of the 5 only the Orp is laying, and all are roughly the same age.
--- May be worth mentioning that one of the eggs she laid while I was out of town was normal size, but abnormally shaped and pretty speckled. She has only given us one other slightly speckled egg before.