Trust me, my Jack Russell was obnoxious. I loved him dearly; I had him for nine years, and I'll definitely concede that he needed a more assertive owner than I. But after spending hundreds of dollars on training and behavioral therapy, I learned that some dogs are so incorrigible even trained professionals can't handle them. My brother's border collie will spend the day chasing geese off the golf course (her actual job), come home and mellow out. My Jack Russell would spend the day chasing balls at the park, come home and knock over the trashcan, poop on the carpet and hump my leg. He didn't have an off switch. Strangest thing of all, I still miss him. He's now living with a family that has kids and a yard ... and probably terrorizing them.