I have a 2 year old golden laced Wyandotte that this morning when i just went out to feed and water was in the pen area with the rest but not looking good. She is Haunched down like she is trying to poop but just standing there not moving. She moved a little bit but as the other ladies went by and everything she wouldn't move. I tried bending down and looking and her vent but the way she was I couldn't see it. But her fluffy feathers underneath that area had a running white poop on it, not a lot but that's what I could see. It also looked like her fluffy part was bigger than normal. I haven't gotten in there yet to pick her up and really look. I will tell you that she has been last to come when I call while they are free rangin the past couple of days. And that also last Thursday the neighbor dog was not watched and came over and just chased the chickens, no fatalities, but this same chicken had hide for 4 hours. Not coming when called. Any suggestions as to what to do and look for would be great!