I had chicks well into October/November last year and started hatching more a couple of weeks ago, so I pretty much have chicks all the time.
I'm not trying to be difficult, or thick headed, I'm just trying to figure out the best method to keep the chicks from getting sick and not cause issues for the pullets/hens that are laying as well.
How long do you brood chicks before introducing them to the flock? You're hatching all the time, so are you selling excess chicks, processing, building a laying flock, etc.?
Are you still experiencing losses now like you did last year (6months or so ago)? If not, what are you doing now that may be "working"? By now if you are hatching all the time, something must be working for you.
Exposure is going to give you some prevention, along with medicated feed, so exposing them to dirt which they will live on, coupled with medicated feed that should be a good start.
Transition them to all flock once introduced to the existing flocks, they should have built resistance to most strains of Coccidia they will encounter if you've also provide exposure through providing dirt from the existing flocks runs/coops.
They said that is DIDNT have amprolium (that they were feeding).... That is what the poster said.......... They said it just had an antibiotic (and listed the antibiotic). They said they bought the wrong one.
So I am just going by the the OP says.
Edit: so to be clear- I never said Amprolium is an antibiotic.
OK so, you didn't say Amprolium is an antibiotic, my apologies.
The OP did feed a medicated chick starter back in August (?) that contained Bacitracin which is an antibiotic used in feeds to help prevent Coccidiosis and Enteritis. It is also approved for use as a feed additive in poultry with No Withdrawal as long as its fed according to the feed package....
Generally the feed that contains Bacitracin is called A/B Medicated feed (or similar wording) which is a combination of Amprolium and Bacitracin, some feed stores carry it, while others don't.