This book is one of the most detailed books in the field and it is a must for every owner of gamebirds. Dr.Hayes and his wife have done much researchh and breeding of these birds. He does not try to give information as to what you should do if he hasn't breed or raised or treated birds of any species. The breeder can learn alot and put it to good use in his or her aviary. Thus saving a lot of expense and time with sick birds. Take care of the birds as described will make you a very smart breeder.