Amprolium has no witholding period. If you have the Protozoan in your soil it will only effect the chicks once they are on the ground. How they are packaged or sent has little or no bearing on it.
Amprolium is however a thiamine inhibitor and it starves the cocci to death , unfortunately if used over an extended period of time it can also cause a thiamine deficiency in the host and ultimately lead to wryneck.
I was wondering why there would be a withholding period on a vitamin based medicine. I swear by medicated chick starter. Each and every time I have hatched chicks and put them on non medicated starter as soon as they go on the ground they start dropping like flies.
What are ya'll's feeding regimes?
how long to feed starter
and then layer
and how much
same thing with fermented feed?
I am looking for the most efficient feeding plan