I'm afraid SchH titles are misinterpreted. 1,2,3 are different levels, but all do have protection part included. Training on the (puppy) sleeve starts at very early age.
quote "
The Schutzhund Titles ^
There are three levels of the Schutzhund test. SchH1, SchH2, SchH3
For Schutzhund I the dog must be at least 18 months old and pass an initial temperament test by the judge. The dog must heel on the leash and off, demonstrate the walking sit, the walking down, and the stay tests, as well as the send-out. It must retrieve on the flat and over a hurdle. In tracking, it must be able to follow a track laid by its handler at least 20 minutes earlier. There are also protection tests.
For Schutzhund II the dog must be at least 19 months old and already have earned its Schutshund I degree. It must again pass all of the obedience and protection tests required for the Schutzhund I degree, but those tests, for Schutzhund II, are made more difficult and require greater endurance, agility, and, above all, control. There is an additional retrieve required over the six-foot slanted wall. In tracking, the Schutzhund II candidate must be able to follow a track laid by a stranger at least 30 minutes earlier.
For Schutzhund III, the master's degree, the dog must be at least 20 months old and must have earned both the Schutzhund I and the Schutzhund II titles. Again, the tests now are made far more difficult. All exercises in obedience and protection are demonstrated off leash. There is the addition of a walking and running stand. In tracking, the dog must follow a track that was laid by a stranger at least 50 minutes earlier. The track has four turns, compared with two turns for Schutzhund I and II, and there are three objects, rather than two, that must be found by the dog. The picture of obedience, strength, eagerness, and confidence presented by an excellent Schutzhund III team is a beautiful illustration of the partnership of human and dog.
"unquote
I do agree with Cordelia that placing an ex SchH ain't straightforward. Not because dog would be agressive, but coz you need full background info on specific dog. What has been their cue's - how was the dog trained (there are also clicker scH trainers), strengths /weaknesses in character etc.etc. I doubt if I would ever take an ex-protection dog into my household. I know therapy dogs which are fully protection trained, I grew up with fully trained police dog (similar to SchH3 ), and as an 8-15 year old kid this dog joined me everywhere and was the best family pet ever. He never showed any sign of aggression whatsoever.