I hatched out three Japanese quail 5 weeks ago and ended up with two male and one female. Yesterday I noticed that the female kept falling over onto her head when she moved and that the two males had been pecking at her in the night. I have removed her now and put her on her own. She eats and drinks and is not light and boney but she cannot groom herself or walk as she just topples over and ends up on her back. I have been feeding her chick crumb and a quail mix, her water is changed twice a day and her litter is kept clean. The other two quail are totaly fine.
Does anyone know what could be wrong as I have not had quails before.