I had the same problem. I had gotten 4 of them from a person that had hatched them out two were a beown color and the oether two have more gray and black. I had 6 babies I got from tsc. so I put them all together. I was feeding them Medicated chick starter Iam keeping them in the house till it gets alittle warmer. Anyway I got up one morning and I found some poop with blood in it so I watched to see who was doing it. I finally seperated the EE from the others and watched then I relized it was the two brown ones. So I seperated them by their selfes. I was feedind them the medicated feedand also put Apple cider vineger just alittle in their water. I did lose one but I started babying the other one would take her outside with me and I kept her by her self until I notice know more blood in the stool the only problem I have now is she/he is spoiled rotton.