my oldest daughter passed away at five and a half in a tragic pool accident.  When she was about a year old, maybe older, we had chickens and she would help me gather the eggs.  We fed them, played with our little bantam cochin rooster (feather boots), tended the horses, and looked after the 3.5 acre property we rented.  She was my best friend and alarm clock for five and a half years.  
So I want the chickens for very literal chicken therapy.  Right now they're just chicks,  but later, when grown, I'm sure I'll love seeing them do the same things the chickens did with my daughter.  I'll relive the moments and her laughter.