Our 6 month old pup seems to have started 'guarding' the house at times, she sits somewhere up high in the living room (sofa, stairs) and stares very intently out the window, she also will jump up from sleeping to bark if there is an unusual sound outside. If I leave her outside on her own for a while she will often sit at the end of the passage down the side of the house and stare at the gate, again she will bark if there is noises the other side. I've never had a 'guard' dog before so I don't know if this is a problem or not?
At the moment I just try and distract her and reassure her a bit - she is a bit nervy generally.
She is a ridgeback cross btw, rescue since 9 weeks, very early life unknown.