We went from Irish Setter to Border Collies, and our last one, Nick, tried to assume the role of cat herder, but they paid no attention, so that frustrated the crap out of him, so he went to a lifetime "back up job" of frisbee catching.
When our daughter got a miniature, long-haired dachshund puppy, he just walked over to Nick and snuggled. Nick looked up with a "What the hell is this thing?" look, and when my wife said "Sorry Nick. He's staying,", he let out a big sigh and that was that. He would occasionally growl at the puppy, but only if we were watching.