My oldest was three months old when he attended his first trial, I think it was the 1991 USA North Americans. He's 16 now and just put a BH on his own dog, also a rottweiler
His younger brother hasn't picked a dog yet, but he likes working as a decoy. You can see them
here. Our youngest is just two and she's growing up with a lot of high drive dogs.
When I first started out in SchH what I remember being told is that all dogs bite - we're teaching them when to bite and when to let go. SchH is all about control and stability - there is no reason that training in SchH would make a stable dog turn around and bite a child.
Liz