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So just feeding them medicated chick starter will work? Also I have a mixed flock (a turkey, ducks, chickens ) can they all get the same kind of coccidiosis?
This information is incorrect.
Medicated feed is meant to help chicks develop resistance to cocci protozoa. It is NOT a treatment for a cocci outbreak. Also, duramyacin is an antibiotic and is of no use for cocci.
I recommend Corid or another liquid Amprolium 9.6% product. The dose is one to two teaspoons per gallon of water for five days. You'll need to chance the water every day and try to make sure that your chickens don't drink from any unmedicated water source during that time.
I can't remember if turkeys and chickens and ducks get the same cocci. Something in the back of my brain is telling me that different strains affect the different birds. But i can't say for sure.
That said, Corid would be the treatment for all of them as far as i know. I only raise chickens, so take that into consideration. Mostly, i wanted to make sure you know that you can't treat cocci with medicated feed and/or antibiotics.
Is your guinea new to your location? If so, he probably is the culprit, and you might be able to medicate just him if the rest of your flock as been there for quite some time and is already adjusted to your soil protozoa.