Originally posted by Cincy'sMom
A new puppy willoften test the limits andtry to make themselves "alpha" of the pack. I think Maggie wants very much to be the alpha and you have to let her know that is not going to happen. It is so hard to discipline a dog when they are these tiny little adroable puppies, but if you don'tknow, it will never get better.

I would make Maggie work for everything. Don't give her dinner until she sits. Maybe for awhile even hand feed her. Really show her, everything comes from the humans.

When she gets aggressive playing, end the play session. walk away, put her in another room, her kennel, whatever. Make her realize that behanvior is not accetable and will only end her play.

If these things don't work, you may have to go a step further. Maggie would not be allowed on the furniture, on the bed ( if she is). I'm not a behaviorist, but I have heard many say, if the dogs are at the same level as the humans, they will act that way. We have never had any aggrssion/dominance issues with our dogs, so we have not worried about it, btu I know it works for others.

Finally, Maggie may need some outisde trianing. Puppy classes are wonderful for socialization and to teach us humans how to react in a manner that the dogs understand. Some dogs need messages different ways. What works to "punish" one dog may not phase another.
I agree with this 100%. Putting Maggie on NILIF (Nothing in Life is Free) program will definitely put her on the right path. Cincy's Mom's suggestion on stopping the play when she gets inappropriate is also important in establishing boundaries for the girl. I also feel training classes are a must. You might want to look for a trainer that also has some behavioral skills.

Good Luck.