Why does my chicken not lay eggs, it's been over 3 weeks since she last laid an egg

[Grorres5576chicken]

If you remember me, my chicken used to be sick with some unknown illness, well she can walk now, her feathers aren't falling anymore, but she still has not laid an egg, I'm worried cause I heard that chicken who don't lay eggs are sick or bad overall health, she also has lost her appetite, I don't know what to feed her thought, I don't know much about what is safe for chicken that mine likes, (she's really picky)

 

[Grorres5576chicken]

For those of you who don't already know, she is about 1 year and a half old (I little bit less tho)

Any help would be appreciated, since I don't have local vets who treat chicken, none that I know of

 

[kittynpuppy]

I am not a chicken professional but here's what I would do:
1. make sure she has access to clean water and her food has plenty of calcium in it. Oyster shells should be included in her diet.. but I am sure you already know that.
2. Are her tail feathers up or down? Does she look like she wants to push an egg out? She could have an egg stuck, but that results in death pretty quickly. A broken egg inside could lead in an infection though so make sure when you look at her vent that there's nothing there like pieces of stuff coming out. I hear a warm 20 minute bath can help this situation....
3. Check for mites. there are other posts on how to do this.... and how to treat.
4. Check for fever with a rectal thermometer...I am not 100% sure but I think over 102 is bad.

I hope this helps. I will not be insulted if someone who has more experience replies with a better response... and listen to them over me I just wanted to help since I know I fret over my ladies and I appreciate when people try and help Good luck