Our 3 Buff Orpingtons & 2 Plymouth Rock's were born April 1st. They all seem to get along well & the buff's are exceptionally docile and friendly. They climb into my hand and love to be petted and scratched. The Plymouth on the other hand, do not climb into my hand and shy away when I try to pet them, totally opposite of the Buff's. One seems exceptionally skiddish. They all seem to be healthy and happy, until I put my hand in the brooder and the one kind freaks a bit. Any ideas???