The ages of the dogs tell the story! Having a 14 year old dog that had little socialization the first 11 years of her life and then adding younger dogs to the household, it was Oreo that had the problem not the others. She has adjusted but she still does not like the younger dogs very much. The only one she has actually fought with is Dazzi but I think that was about two females deciding who is alpha. She has never gotten into it with the rest but they are all male. She never "attacks" anyone at the dog park but she does growl and snarl at them. (I honestly think she thinks all the others will back off and that is all she will have to do - and so far it has worked).

Don't worry about it, Robin, it is not Katie's fault. I am sure she will do fine with all other dogs she meets!