well I don't remember giving them berries, but there may have been a way they got the. Thanks for all your help! So is there any coccidiosis?
Merck Vet Manual's section on coccidiosis ...
http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/200800.htm
The best option, if you even suspect coccidia to be the cause, is to immediate treat your chickens w/ amprolium. It merely blocks the thiamine, to which coccidia are fifty times more sensitive to than chickens are, so there's no reason for concern that it's gonna harm your birds. The coccidia, however, will do extensive harm to your birds ... that's why I suggest you treat immediately.