I have one hen that is sick, and I am worried that my other hen may be getting sick. Please offer any suggestions that may help my situation. -I have four chickens. 2 easter eggers, 1 wyandotte, 1 buff orpington. One easter egger and the wyandotte are hand-me-down hens that I have had since June. I do not know their age or history. They have been normal and laying well until recently. I suspect that my recent addition of two new chickens 1 easter egger, and 1 buff ornpington may be the source. - I got the two newer chickens about three weeks ago. They are spring chickens that will be ready to lay anytime, but have not yet layed. I kept them separated for about two weeks. I introduced them with my original two hens about a week ago. They are all now integrated into the same space. Everything seemed to be going well until this weekend. -My older/original Easter egger hen went from seemingly healthy to ill overnight. Thursday everything seemed normal. Upon letting her out on Friday morning she ran out with spunk, but then stood there lethargically with her eyes half closed. Her poo still seemed normal in consistency and color. Since Friday she has not been eating very much or being her normal self. She is not currently laying either. I have encourage eating with different treats, but little interest in food has taken place. -I can not say what her poo looks like today (Monday), since she is barely eating. She is definitely lethargic and weaker. Her crop was essentially empty when I felt it in the coop last night. I am concerned that my older/original wyandotte now may also be falling ill. Her crop was also empty last night in the coop. She also seems to be slowing down today. She did lay a normal looking egg yesterday, and the day before. -The two newer chickens are spunky and eating well and had full crops last night. They do not seem unhealthy...but I have heard a occasional sneeze and cough from them... I have not previously been alarmed, since the sneeze/cough has been random/ occasional, but now I am suspicious. -Current Diet- Layena layer crumbles made by Purina, i add oyster shell and granite to the feed. They usually get a daily treat of plain yogurt and some fruit of boiled veggie. They are allowed to free range in the chicken tractor and in my fenced garden. -Attached are some photos of their current living conditions. They are in a home built tractor. We move it each day, and I scoop the poo out of the tractor with two cat scooper each day. It is well ventilated, and has a small solar fan to keep air moving during the hot part of the day. (we are in a area where you are not technically allowed to have chickens, so I am hypersensitive about any flies, smell and/or noise) -attached is a photo of the easter egger that is ill. Her expression to me is dull and not normal. She has never been a beauty queen to begin with, but is the most sweet and most easy to handle. I have worried and unable to do anything sooner because we were at a work related show this weekend. I do not know of a vet in the area to treat chickens. The only vet I have found so far wants a starting price of $50-60 per animal.