Hi there. Ok, so first of all, we own a cat. She is 6 years old and lives upstairs. Now, Missy my 11 month old puppy knows that there is a cat upstairs. Every time my parents go up the stairs, feed the cat, scoop the litterbox, go to bed... she barks and lunges at the barrier between the kitchen and front hall... Is there any way I could desensitize her to these things so as not to have her go berserk? Any advice would be greatly appreciated! Thanks.