Hi I have a female chocolate lab, Maggie...I was on here under a different name and couldn't log in anyway ...Maggie has started to bark a lot for no reason AND when she hears noises, the door bell, any sound what so ever, dark especially scares her. Her fur goes up, tail up and growling and barking, she is also showing this behavior when people come up to us. I m worried she might be becoming aggressive...or is she just scared? ANd how do recify this behavior. Also she is still nipping, bitting and even snapping, she will put her teeth on us but not bite hard. This is even when we go to pet her, not just when we are playing. She doesnt break skin, just holds our arm, hand, whatever, in her mouth. She still jumps on people, and has many bad habits, she simply doesn't listen. I LOVE my dog to death...but I cant have a dog who is aggressive. Should I try putting her in puppy classes, that way she will learn, and be around people and other dogs?