Missing Best Friend (Shingletown)

Missing dog! Our best friend went missing in the Plateau Pines road area Tuesday 3/12 in the am.
German Shepherd/Siberian Husky 130 pounds.
He’s tan with a white belly and a black muzzle.
His name is Rusty.
He’s not on the friendly side but is not mean.
He’s territorial and has never run off previously.
He has never mixed with other dogs or cats.
Best case scenario is you spot him, contact me and I can respond right away.
He’s a great dog really, and is missed so much.
$300 REWARD if your tip leads to us bringing him home safe! Please help us find our buddy!