I'm not an expert but I'd never use any kind of correction collar on a dog this age. She's a baby, and walks are supposed to be lots of fun! At 9 weeks you can't have had her hardly any time at all?
I've heard 4-5 months is ok to start? Maybe someone else has info on the timing, but I think 9 weeks is too young.
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Warden - Sable GSD 4/23/2013
Blackjack - Black and tan GSD 4/23/11-6/1/2012
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