I'm not thinking of getting one, if I get a rottie (highly likely at some point) - it will be a rescue. But! Are there many show breeders who also test their breeding stock with work? For example Schutzhund qualifications? I don't know what else there is in the UK to work these types of dogs and there is a rottie at my SchH club.. I believe they're quite popular in the USA for things like SchH. If not, why not?