HELP! SICK DUCK

My 4 month old female mallard stopped eating. It’s been 48 hours. She still drinks water but she is very lethargic and her poop is lime green. I tried force feeding her, her pellet food, she only ate 3 pellets. I’ve made her scrambled eggs, rice, got her wet cat food and she won’t eat anything. Any advice please!! I’m afraid she will die. I know she doesn’t have any egg issues since she’s not at that stage yet. She’s an indoor duck as well and I know she didn’t eat anything poisonous Please help

 

I actually figured it out. I got a bad bag of mealworms, even though they were within date and didn’t smell weird. She just started eating few hours ago and took a bath for the first time in 2 days. Thank you all!

 

Aww yeah, she’s very spoiled, she has two other ducky friends. A large carpeted room that’s covered in plastic and sheets to themselves with water, high protein food, toys. And they go outside for many hours a day, if the weather permits. It’s in single digits now here. But they still get out and roam around and get baths a couple times a day. They also get niacin and brewers yeast.