Well, it's like people. Nobody's body ever returns to how it was, but the extent of 'damage' varies between individuals - some sag enormously, some to a lesser extent. In short, no way to tell.
I think though, that you need to re-read the rules for posting about breeding matters on this website. Boxerworld supports wholeheartedly
responsible breeding practices only, and does not provide this forum to be an information resource for backyard breeders. We do not want those sorts of unethical and irresponsible people on this site. Thus, if you want to post about breeding matters, then you need to first provide proof of the genetic health testing programme you have followed. Details of where to send copies of the test results are given in the board
rules
You can find details of the genetic diseases for which testing *must* be carried out before a dog can even be considered for breeding at
www.boxerworld.com/health_testing along with details of the specialist tests that need to be performed.
And for information - in case it is relevant to you, here are a few other links about responsible versus irresponsible breeding:
Basic knowledge required before considering breeding a dog:
http://www.boxerworld.com/forums/showthread.php?t=11396
Unacceptable reasons ever to breed, plus overview of how to learn to go about it the right way:
http://www.boxerworld.com/rescue/top6/
Excuses:
http://www.boxerworld.com/rescue/excuses/
http://www.boxerworld.com/rescue/byb/
Boxer FAQ - including what to look for in a responsible breeder and who to avoid:
http://www.boxerworld.com/faq/
The consequences for unsuspecting buyers of backyard breeding:
http://www.boxerworld.com/forums/showthread.php?t=76541