- Jul 24, 2013
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Your girlfriend is correct: feeding medicated feed will negate the vaccine. This is because a Coccidiosis vaccine is an injection of a few Coccidia. This causes chicks to build resistance/tolerance to the Coccidia, as, in small amounts, Coccidia will not severely harm a bird. If fed medicated feed, the few Coccidia that were given to the chick are killed, and the chick's desensitization to Coccidia has to start all over again. But if not fed medicated feed, the chick gets used to the Coccidia that inhabit its digestive tract, and, as long as the Coccidia don't suddenly rapidly multiply, the Coccidia have little effect on the chick. Of course, if the chick is introduced to new Coccidia (like when it moves into a new coop, etc.), it can still become ill, as it has only built resistance to the type of Coccidia that was injected into it.I am happy to report that the other two little chicks seem to be recovering and on the mend. No more bloody poop, perkier attitudes, and eating/drinking/moving around again. The guineas never showed any signs of being infected, perhaps their immune systems are already tough enough.
I talked with a girlfriend today who got chicks this summer and had them vaccinated for Cocci. The chicks I have came from the same hatchery, though I'll have to check with the guy who raised them before me to see if they were also vaccinated. Question though: my girlfriend said that she was instructed NOT to feed medicated feed as this would negate the vaccinations given. Is this true? Can anyone explain why? It is so interesting and I never would have thought this to be the case.