Corid and medicated feed

[Daciahop3]

Is it ok to give corid to my chicks while they are on medicated feed. Is it just as effective or , since it's already in the feed, will they cancel each other out?

 

[Kiki]

If your chickens have Coccidiosis while already on medicated feed...it proves that the medicated feed does not alway prevent Coccidiosis.
You should stop feeding the MF and start the Corid treatment.
Do not offer any vitamins while using the Corid.

 

[Chickmamma29]

Why no vitamins while using the Corid??

 

[Kiki]

Why no vitamins while using the Corid??

Here ya go:
http://www.armchairpatriot.com/Home-Vet/Plumb's Veterinary Drug Handbook [Desk Ed.] 6th ed. - D. Plumb (Blackwell, 2008) WW.pdf

Page 62
Pharmacology/Actions section states:

EXCESSIVE thiamine in a diet can reduce or REVERSE the anticoccidial activity of the drug.