Yelp, sounds like Cocci to me. You need to get them on Corrid. Some people use Sulmet but it is not as affective as the Corrid is. What are you feeding them? I would feed medicated chick starter.
ETA: more info:
Coccidiosis is a disease caused by microscopic protozoans (one-celled organisms) called Coccidia that affect fowl worldwide. It is generally found in the terminal ileum, caecum, and rectum of chickens. Mortality and morbidity is variable with this disease. Although there are many species of coccidia that can infect fowl, domestic animals, and humans each species is host specific. After an outbreak of a specific species of coccidia, the flock will develop a resistance to the exposed coccidia species but remain resistant to other infective species. Chickens are susceptible to any of nine coccidia species, turkeys are susceptible to seven species, and quail to four.
Signs
Coccidiosis is seldom seen in chicks under 3 weeks old, but usually seen in growing birds or young adult fowl.
Signs:
Droopy feathers
Poor production
Ruffled feathers
Closed eyes
Diarrhea
Pale face
Paralysis
Blood in feces
Transmission:
Coccidiosis is transmitted by direct or indirect contact with droppings of infected birds. When a bird ingests coccidia, the organisms invade the lining of the intestine and produce tissue damage as they undergo reproduction. Within a week after infection, the coccidia shed immature descendants that are referred to as oocysts. The oocysts shed in the droppings are not capable of infecting another bird unless they pass through a maturation process (sporulation) in the litter. This sporulation occurs within a one to three day period if the litter is warm and damp but can take much longer if the conditions are cool and dry. After sporulation the coccidia are infective if consumed by a new host bird.
Diagnosis:
Since it is common for some healthy birds to possess some coccidia, flock history must be taken into consideration before an acurate diagnosis can be made. Coccidiosis cannot be prevented by sanitation alone and therefore certain measurements need to be taken with coccidiostats.
Treatment:
There are a number of coccidostats available, however these should be used precisely. These include Toltrazuril, Sulphonamides, Amprolium. Vitamins Vitamin A and Vitamin K in feed, or water as coccidosis cannot be treated by hygiene alone.