These are dogs bred for work. What matters is the perform a job from age 2-6. The guys performing training don't worry to much about potential damage they are doing. Whilst I do think that sort of stuff is extreme I wouldn't risk that with my 8 week old.
We as "pet" owners care about our pup. Dogs bred specifically for a job will risk it.
The mal is more robust than the gsd, it is also lighter and matures at a slower rate. So you can go a little harder on them whilst younger.
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