Sick turkey, please help.

We have a 5 month old royal palm hen who is acting off today. She is moping around and sleeping a lot. I brought her in and gave her a once over and found nothing wrong with her. Her crop feels normal, she doesn't have any respiratory problems and her poo looks normal. About 2 weeks ago we came home to blood on her foot, and a nail that looks to have been ripped out. I've kept an eye on it everyday since and it has shown no sign of infection. I'm not sure if that could be related or not. Our birds are fed a mix of oats, wheat, split peas, corn, lentils, flax seed, and kelp free choice and they are also free range. About 2 months ago we lost her sister and it started off much like this but she had a large, squishy crop and I don't want to loose another one. Does anyone have any ideas what I could do?