I sent you a private reply with some good information since you definitely do need some at this early time.
But I will also state publicly that a first and second heat are completely out of the question for breeding. Would you want to have 8 babies at age 13? By breeding in a 2nd heat that is exactly what you are doing to a poor puppy bitch.
I won't clog this board up with all the health testing a responsible breeder does but there honestly is no way you can look at a 4 month old puppy and say "Breeding Quality". The best you should be doing is saying "Cute Puppy".
Please read the email I sent. I am glad you are asking questions now before something terrible happens.
And lest anyone think I don't practice what I preach about health testing, I just Holter Monitered my 8 year old bitch to make sure all is well. I love my Boxers and health testing is a step NO responsible breeding can overlook or refuse to do. I am proud to brag that she passed her Holter with flying colors
