Thanks for the reply. I think an update is very important in this case.
Please bear in mind that I HATE formulaic shelving of behaviour. But this situation really was so startling and blatant.
When they were together and aggressive I put it down to protective. But I honestly feel that it's "I will protect the pack to prove I am top dog", rather than true "nice" protectiveness. I really feel that these guys were both just vying for attention and power in the pack. I had always said that the aggression was based on the need for dominance, but I had no idea that the two were actually competing with _each other_.
I am not a small dog person, and I have to admit I assumed it was just "small dog syndrome"...I am not proud of that.
It has been an eye opener. i am going to watch paired dogs (and I admit small dogs more, because they tend to be the aggressive, bicycle chasers) to see if pairs are worse than singles. I hope I can be impartial and also factor in owner behaviour....some owners can be atrocious.
The truth is that the change in their behaviour in our case is so profound that (at least for Scruffy and Bruno) there is _no need_ for showing that aggression is not needed.
For us and Pearl, the matter is still in flux.
She is 10 years old. I can remember that she had an attitude when she was a pup. It may just be that she needs to go to a home where she is "it" and then she will be a _relatively_ nice dog, with occasional issues.
For Scruffy I see a better and better future. He is a completely altered dog. 10% aggression and some of that justified by bouncy big dog puppies.
Hey! I see people who are able to accept, and even laugh at, dog behaviour that I find appalling, just because they are small dogs. _Somebody_ will find Pearl a good dog.
IF we can show a vast improvement when out Tess tarries along on walks, the I have no objection to Pearl being a family member. She is a cute little girl.
Nick Peg n Benny (or is it Peg n Benny n Nick?)
(nTess, forever in my heart)