I have 2 flocks about to be combined as well as accepting a small flock from a friend. I wanted to deworm and give some corid to the flocks to build up immunity (I will be quarantining the new additions first). Is it normal to use corid to help chickens build an antibody? Also is it a problem to treat for both at the same time? I thought I would treat the ten (10 week) chickens before they start laying. I don't think my flock of five will be laying when they are first switched to the new coop anyway. Also is calf corid okay to use for chickens? Thank you!