Cocci is a gut flora that is naturally carried in the birds. The problem arises when their systems are bombarded with new pathogens and Cocci has a chance to overpopulate the gut.
I treat it for under $15 in purchases for about 80 young birds, and have effectively done so for 2 years. Plain yogurt, no additives, just yogurt that lists active bacteria cultures, oregano oil, apple cider vinegar and Aloe Vera Juice. To a large yogurt container I add 1 full dropper of Oregano oil, mix well and add feed. To the water I ad AVJ, 1 tbsp per gallon, I do this for a full week. Week 2 I continue with yogurt with only half a dropper of oregano oil and change the AVJ for ACV. I change back for one week to AVJ after that feeding yogurt without any oregano oil.
Yogurt: Aids in the restoration of gut flora levels
Oregano Oil: all nature antibiotic to help battle off anything that's overwhelming them
Aloe Vera Juice: cleans the digestive tract without damaging positive flora and bacteria levels
ACV: Good nutrient level and body cleanser
It's worked for me. Others here may advise you against it. All the best.