I sent a fecal sample to my vet so she could check for worms. She called and told me that though there were no worms, she found the sample was full of cocci. She recommended that I treat the whole flock with Corid, but I don't know what dose. She then went out of town. I don't know what to do. I have three older hens of 3 years and two 18 week old pullets which have been with the big girls for two weeks. I find no signs of coccidosis like bloody poop or lethargy. All are eating and acting normal. Should I go ahead and treat them for 5 days or do some preventative measure? Or are they immune to this cocci? What is the dose for liquid Corid? I have read anything from 1/2 to 2 teaspoons per gallon. This is scaring me to death. I don't want my chickens to die. And we are preparing to leave in Sept. And have a house sitter care for the chickens. Please please advise.