My cat is rather impartial, actually. My dogs consider the harp a big thing in the way of my lap, and why am I paying attention to that when I could be playing with them??? My only pet that likes my harp is my rabbit, actually. He mostly lives outside but when he does come inside to visit, he loves music! Just have to keep him from getting too close…yummy wooden instruments are oh so appealing to little bunnies!
(My cat only is interested in music when there is a flute/recorder playing. Then she gets all excited! But the harp produces no reaction.)
Good luck!