I am loathe to diagnose by e-mail, but this sounds like Manic/Depressive behavior to me. When she is up, everything is wonderful and the doggie is the light of her life. But the first time it piddles on the carpet when she is on the down side, it’s “Out the door, Poochie!”
If Ellen ever decides she wants to toss out Portia de Rossi, I am certain a number of FReepers would be willing to help out...
I’m sure Portia doesn’t pee on the carpet. (Ok, kids, its on the tee, go ahead and take a swing!).