If they are young,they should not have laying pellets,to much calcium in them. They should just have chick feed. Do they have grit,if eating scratch? Medicated chick feed will not prevent cocci,if you feel they have cocci,purchase Corid(amprol). Corid comes in power or liquid,not sure what the feed store sold you,but it sounds like medicated starter feed for calves. This is not the medication for cocci. Corid goes in their water.They were on medicated chicken food and mixed in a little bit of what we feed older chickens (scratch mixed with laying pellets)
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