Since you're new to this forum, you probably aren't yet aware that breeding is a sensitive issue here. Mostly, it's frowned upon, unless the health of both the sire and dam have been thoroughly tested in advance (not just the vet saying, "they're healthy") and the sire and the dam have been evaluated to be really good examples of Boxer conformation and to complement each other in the match. The best place to get good advice and learn about breeding is to find a mentor, an experienced and reputable Boxer breeder who can guide you through all the steps along the way, and, BTW, let you know if your dog or bitch is actually breeding quality.
Otherwise, in general, we urge that people spay or neuter their dogs to avoid adding to the huge overpopulation of dogs that end up being euthanized. And spaying and neutering are healthier for the animal in that it won't be getting mammary cancer, or testicular cancer, or a uterine infection that could kill it, or die in labor, or any number of other conditions that I'm sure go on and on.
So, if you haven't started the process yet, I would seriously, seriously think it over. If you already have puppies on the way, I would try to find someone in your area who could help guide you through the process. Check with your local Boxer club, or ask your vet to recommend someone. You have to put the health of the animal first above all and make appropriate decisions that will foster this goal.
