How do i stop my dog from growling at my other dogs for no reason
i have a teddy bear dog and she hates other dogs but then she started growling for no reason! why would she start all of the sudden? she growls at our 2 year old Saint Bernard named George and she hates our 3 month old collie named Oliver. she bit my dad multiple times and now she stopped and she cuddles with him but only likes black labs and Shetland sheep dogs. why is that happening all of a sudden?