Puppy rescued from auction/puppy mill

Wow. These are all wonderfu responses to your question. IMO, the 4 month old probably wasn't in the litter long enough to learn any social skills or body language from mom or the litter (facial expressions, posturing, etc.) So, it's a hard call when you can't exactly see what is going on, especially since we don't look at things from their point of view. My suggestion would be to let them interact supervised as the older pup will probably try to use its communication skills and eventually the little pup will learn. If it's a knock down, drag out fight, then break it up by removing new pup.

Patience!!! One week is not very long, especially for such a young puppy. I've had my 3 year old Yorkie rescue for about a year now and he's still working on the trust issue--with people and with my 6 other dogs. He trusts no one but me. He will attack my 75 lb.greyhound! He thinks he's protecting me. When I first got him, he would spin in circles almost constantly. I had to crate him just to get him to calm down. He's doing much better now and gets along with all the other dogs. He still feels the need to protect me from just about everyone and everything. It's really cute watching this 5 lb. little guy acting so tough! Try to find a good and gentle trainer to help you out. As long as you are the pack leader, Glenda and the pup will work things out between themselves. Just don't let them be alone together yet without you (the pack leader) there to keep things under controll. Good luck, and bless you for giving this pup a chance.

Mary,
It was nice of you to take on this puppy. But adopting this dog has you have found out is going to be a challange. I would strongly recommend that you contact a positive trainer in your area to work on the many issues you are having. Dominance is a term that is being over used by many people and is not what is going on with your dogs. DO NOT let the dogs work it out on their own. Run don't walk to a trainer in your area.

I would offer her something good and yummy everytime glenda is around. This way she will learn to associate glenda with something that makes her happy

Maybe try putting them in two seperate rooms so that they can get to know each other through the door. Maybe after a couple days slowly introduce them to each other when they are both in a calm/relaxed state.

You could also try taking them on a walk together (one on each side of you) This way they get to know each other while burning off any aggressive energy.

I think you should extend her out of the crate time. If she is being crated, and Glenda is not, that could make her feel the need to dominate. As long as you are near, I feel that you should let her out. The sad part about rescuing pets from puppy mills is that they are not socialized, and loved. She may never have felt grass or carpet, or anything other than a wire cage bottom. You are going to need lots of patience, and so is Glenda. One of the other problesms is that their mothers were not able to teach them manners. She needs some loud Ahh aah sounds to let her know when she ifs wrong. Glenda may bark or growl at her. Believe it or not, she needs that. She needs to find out where her boundaries are, and where Glenda's are. You need to be the alpha dog, and let them sort out the beta dog part. There is a journal on the home page of zootoo written by a woman who trains dogs, and about alpha dog behaviour. She is very sweet, and you can email her directly with any questions. She is a friend of mine: ShaktiShiloh, and I'll bet she can answer all of your questions!