breeding my boxer

Question
hi my boxer is ten months old and she has just went into heat . i am not sure at what age she is ready to breed at as i have heard a varied age range and at what stage wen she breaks down will i know she most fertile..
thankyou
michael

Answer
I would really leave it until her second or third heat.  She is not fully grown and boxers often need caesarians as it is.

A dog is on heat for 21 days.  7 before bleeding, 7 bleeding,  and for the 7 days after the bleeding has stopped she is fertile and will accept a mate.