Chicken with blue comb

@Wyorp Rock
@TwoCrows ?

 

I'm sorry your hen is not doing well

How does her abdomen feel - bloated, fluid filled, soft, etc.?
When she did lay eggs, were they "normal" - any problems with shell quality, laying soft shell, shell-less or wrinkled eggs?

A blue(ish) comb can be an indication that there is a lack of oxygen.

Since she is a "production" hen and hasn't been laying eggs for months, there is a good possibility she may be suffering from an internal laying/reproductive disorder like Egg Yolk Peritonitis, Ascites, Salpingitis, cancer or tumors. Some symptoms of any of these would include loose/runny poop, going off feed, weight loss, sometimes swelling/fluid in the abdomen, difficulty walking (lameness) and difficulty breathing/lack of oxygen (fluid or egg masses pressing on internal organs/air sacs suppressing oxygen flow).

Do the best you can to keep her hydrated. Offer her some poultry vitamins in her water if you have them. Sometimes when not feeling well, they won't eat their normal feed, you can try seeing if she will eat some chopped egg or tuna. Make her normal feed available.

Keep us posted.

 

I agree with Wyorp Rock in that it could be a reproductive problem. I would feed her some egg and put some water into her feed to make it like oatmeal. A tsp of plain yogurt daily in the feed, and keep her drinking plenty of water. The NutriDrench is good for her. If you feel that the layer feed is not good, just feed her Flock Raiser. I have some older hens who don't lay, and they eat layer without a problem. In theory roosters and non-layers should not eat layer because of the high calcium, which can lead to kidney disease and gout.