Sour crop, Mites made hen anemic, Double Whammy

So I noticed about a month ago my hen was ill. I touched her crop and it felt like a water balloon. She started to get better, but I let her free range too soon and eat grain. Her crop started to bloat again. Last Thurday I help her vomit, then started a strict diet of only yogurt for about two days. I finally got her crop to fully empty! Her poops have started to return to normal and is on chick starter and is FINALLY drinking water all on her own (electrolytes and probiotic). Now along with sour crop I am dealing with mite and I am trying to help my hen get stronger. She looks better today, but I need to her iron up. With me still working on the sour crop, what can I also feed her for to help with being anemic. I have been dusting her to help get rid of the mites. She definitely had quite the picky appetite before, she wouldn't eat cooked eggs, only raw yolks. But today she ate the yogurt from a dropper all on her own. She seems to be mending, but I want to give her some extra help, but also take it slow to ensure the sour crop is better.

Welcome to BYC. If you are in the US, you can purchase Poultry Nutri-drench or Poultry Cell vitamins and mineral tonic at most feed stores. They both contain iron, vitamins, electrolytes, and trace minerals. You could instead feed her some beef liver daily, and it is fairly inexpensive in the frozen foods. Be sure and treat her, the others, and the coop for mites. Permethrin is a good choice, and will require a treatment every 7 days until no mites are seen.

Thank you!! I was thinking about liver! Stuff stinks, but if helps my hen I will deal with it. Just can't wait for the sour crop to be gone. I think she is liking the yogurt now, I just push the dropper and she gladly drinks.

Crop problems can stem from many different causes. Sometimes it just doesn't work properly, and with many diseases the crop is slow or not working. I just lost 2 chickens recently to impacted crop and gizzard, and sour crop. After looking at their internal organs, I never understood why they didn't respond to treatment. So I would look for other causes of her sour crop. Here are a couple of articles about crop treatment:
https://www.backyardchickens.com/a/impacted-slow-and-sour-crops-prevention-and-treatments
http://www.chickenvet.co.uk/health-and-common-diseases/digestive-problems/index.aspx
http://www.tillysnest.com/2012/01/crop-issues-html/

She had pine shavings stuck in there, but she was also just getting out after winter and found the compost bin and dead grass. Her crop is working now, I just want to take it slow with her and not rush her. I am definitely going to check out those links!! Thank you again for your help! I always have a hard time of throwing in the towel when it comes to sick animals. I just don't give up. My husband stared at me as I was holding her and talking to her and feeding her, "I give you so much credit for not giving up on her". She is drinking on her own and eating like a beast and is starting to make her hen noises. I just hope we keep going up from here!

Thanks so much for letting me know about the Poulty Cell Vitamins. Her color is beginning to return. She has so much more energy! I have another hen with bumblefoot and after I got out some of the infection and wrapped it up, I put her in with the my sour crop hen. I wanted her to eat and drink some good vitamins, well my sour crop hen was not about to share her place, food or water. I had to tell her to quit being a bully or maybe she remember the flock picking on her when she was ill. Her crop has been emptying the past three morning I have checked. I am just nervous about starting crack corn or letting her free range. I've put so much hard work into getting her healthy and is finally gaining weight, I would hate for her to get sick again.