Absolutely. The first time Mika heard me practising (viola) she ran from the room. Now she barely tolerates it (hey, I'm not that bad!) She doesn't mind the piano, but my cat (Triskit) walks up and down the keys while kiddo practises, then when he's had enough of his own "music" he curls up on one end of the keyboard until kid is finished. Mika doesn't mind the husband practising (french horn), so it must be something about string instruments! Canned music doesn't have any reaction on any of my animals.