I have an existing flock of 4 Rhode Island Red hens, 1 White Rock Bantam hen, and 1 buckeye rooster all six months old. I just purchased 5 nine month old bovan, which is a mix of Rhode Island white and red or so I was told. The new hens are clearly from a "factory farm"; pale waddles and combs, missing feathers, clipped beaks, etc. and I'm wondering if they should be separated for a while to regain some strength, quarantined, introduced at night vs. day, or is it not a good idea to mix them at all? I would hate for them to get picked on by the younger, healthier girls or get each other sick. Any advice is welcome. Thanks.
and Welcome To BYC! X2 on TwoCrows advice about quarantining and introducing them slowly behind a fence, there is a nice article on integrating flocks in the Learning Center you might find useful