Liz Monty

With the new puppy I am picking up on Tuesday, I would like to get her spayed The dogs I had in the past I did not spay because they where all papered and being trained for work. So I left it up to the buyers to decide to breed later on not. Of course, if there was a health and genetic concern I did spay or neuter. One male had a genetic teeth fault, one female died of a uterine infection (pyometra). This puppy is just for me, I will not be selling her, but keeping her as my family/working dog. The working part just to give me and her a job to do. So is there any truth to a delayed spaying being better than a puppy spaying? The other question is, if she is spayed, will that disqualify her from earning titles if we ever went the Schutzhund route??