I'd say this is him showing your girl that she's underneath him and is a resource guarder. Just like some dogs will not guard against humans but will other animals.. He sees her as much lower than you and him. And he wants her nowhere near his stuff.
Her age will really help us here.
He needs a real workup at the vet to rule out something wrong.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Sparkles, Lilith, Eve, Candy, Dahlia, Juno, Tonks.
Jaeger, Ben, Goose, Dirk, LingLing, Bentley, Elliot, Batman.