agree with what's been said already. My 3.5 year old female doesn't have a protective instinct in her at all. I don't expect she ever will either. Protect your puppy and if he matures into the guardian you're looking for, yay. if not, love him anyway but don't get your hopes up for a while yet. he's got a ways to go before he's even close to mentally mature.
Shasta GSD 5/5/10 CGC, ITD, TC
"Dax" Thor z vom Weberhaus BCAT CAX2 CGCA ETD HCT NCO-1 PKD-T RATI RATN RA TC TKA 3/18/2013
"Hades" Guilty vom Blutfeuer 10/26/2018
Zena GSD 6/1/03-2/16/2016
Riley GSD/BC 1/10/05-2/1/2013