You might be overdosing them,too much is not good,has the opposite effect. You do not need to spray the ground,cocci can be spread by birds,bringing in new chickens into your flock,carrying it in on your hands/clothes/shoes/feed utensils,etc. There are 9 strains of cocci,so a outbreak/overload can happen at anytime. Most birds have some cocci in their small intestines,only becomes a problem if they have an overload,then we medicate to bring it back under control. Chickens build immunity to the strains they have been exposed to only.I am trying everything I can at this point. I am feeding them medicated chick starter, put Corrid in the water, doing the Tylan, and wormers. The worse one is eating a bit (moistened chick starter, canned cat food, apple sauce) and starting to poop (had quit). It is green but it is poop. The other one is eating pretty good and pooping more (I put them in the same cage and it seems like they may enjoy the company instead of being alone). So I am encouraged with these two (although the one isn't eating nearly enough). The worse one has passed a couple jelly bean size goo balls. Hard to describe. Solid but moist and rubbery. Maybe malformed eggs or lodged eggs, no shells. What about mixing up some Corrid and spraying the bare ground out in the chicken yard?