Boss is a 3 1/2-4 year old neutered male American Staffordshire Terrier/Boxer mix dog. Boss is a large dog that loves attention. He will jump against his cage when you go by to draw your attention to himself. It is a bit intimidating when he first does it, if you don't know him. He is a friendly dog, he just doesn't know how this action comes across. Please don't let these issues turn you away from this great dog.