[Bellasmommy]

I just got my 9 week old lab puppy, and I introduced him to my 4 pound dog. THe puppy who is bigger, chases my dog and nips at her which she doesn't like. They end up in a growling match with each other, and my dog will not go near the puppy. Is this something that will fix itself in time once they get comfortable with each other, or is there something I need to do to help them get along better?

 

[Marsh Muppet]

This will require some serious management skill on your part. A Lab puppy is like a one dog wrecking crew--a non-stop wrecking crew. The older dog will be completely justified in feeling under siege. The puppy is going to have to be taught to respect the older dog's space, and the older dog will have to be able to rely on you to protect her. This will take time, and you can't just "let nature take it's course". You'll have to keep them separated unless you are there to closely supervise their interactions.