Yes they are my own hatch, 16 between 3 broody hens, it is the latest hatch that is suffering, they were A week after the others. They are 5 weeks old now.The symptoms seem to happen in this order, runny white poo all down the back feathers, then straining when they do an actual poo not just white water, very lethargic, drink a lot, and then finally the ripped looking cloaca, I have racked my brains and I can only think that they have eaten some layers pellets when they have got through the fence into my other pen, I know if young chicks eat layers it can be horrendous but I don't know what it does? My other chicks being that little bit bigger cannot get through the fence, so I wonder if that is it, I can't think of anything else?? It looks as if I'm going to loose 2 more
Can you post some clearer photos of the one's that are having trouble?
Separate out the two that are having problems. This way you can monitor them. Give them wet chick starter, water with poultry vitamins and have some chick grit available in a separate container. Nothing else to eat but the wet chick starter.
Try to keep the vents washed up and clean - apply some ointment or coconut oil to the vents and to keep moist.
Eating a small amount of layer feed at that age shouldn't be detrimental - if this was all they were eating, then it's may not be that good. It's possible it could be a developmental/genetic disorder that can't be corrected.
Let us know how they are doing.