Some time next year I'm looking to get another dog since Cody can no longer be in Schutzhund due to severe artheritis and I want a competative dog that I can take all the way to schH3. Isa loves schH and is doing good but she just doesn't have enough drive for the sport and she gets tired after an hour of doing stuff. I want a dog that is willing to do stuff with me all day or most of the day and have a "turn off" button when relaxing at home. My question is, which bloodline is best for schH? I like the look of the DDR lines but I read somewhere that they are low on drives. Is that true?