I have a chance to get three adult Speckled Sussex. They just turned a year old and are laying. I have 8 baby chicks that are between 6 and 8 weeks. They are out each day and in the coop at night. I have a mixture of four RIR, two barred rock, one cochin and one Buff Orphington. I think one of the Barred Rock is a male and we will have to take him back, but waiting to see. I have plenty of square footage in the run for 11 chickens. I know the coop will need to be expanded, but we have an unused dog house that we can convert to help with the housing situation. Is is okay to introduce 3 adults in with the chicks or is that a no no. I know the lady and according to her these adults have been hand raised and are docile and child friendly. They are in a pen with a lot of her chickens. I need to let her know within the next few hours as someone else wants them. The cost of the three is only $20 so I thought that was a great price for layers, but I am concerned about my baby chicks otherwise I would head right over. Any advice ASAP is appreciated.