Nice looking flock! Welcome to BYC! I noticed one of your chickens is named Mabel! I wrote and illustrated a book about a chicken...it is called "Mabel's World"! :celebrate
Welcome to BYC! I used to put mine out by 8 weeks...as long as they are fully feathered. One thing I love about this age is that they sleep all flopped over on each other like puppies! So cute! Eventually they roost and don't do this.