Hi there. I am mommy to an 18-month old male Chihuahua x Jack Russell called Benji. He barks incessantly whenever someone comes to the door and won't stop until he sees that the car has left. He will not listen if I try and call him away. He also barks when we leave the house (jumps up and bites the door handles). When my husband goes for a shower he is even more aggressive; barking and biting the door handles. This does not happen if my step-daughter or myself shower/bath. My husband is not a dog lover and does not interact with Benji. I am at my wits end with the constant barking. Can anyone please advise on how I can train him to not bark so much and to be less "aggressive". I have no other problems with him. He is healthy, gets lots of exercise, is loving, loves cuddles, loves his toys, etc. Thanks 