Socialization/Integration

Question
I have a small 3.5 month old full blooded german sheperd pup that gets along great with the other family dog and two cats.  I got an 11 month old german sheperd today who is fairly aggressive towards the two dogs.  I haven't checked her at all with the cats.  How do I integrate her into our "family"?

Answer
It sounds like she thinks she is being threatend. Introduce her slowly to one of your dogs at a time, for a short period, if she does get aggresive, try and hold her but keep her in the same room as the other dog. Do this with the other ones and she should start getting friendly.