Now my dog (a 3-legged dalmation) will always howl if I play mouth organ, but wont if I play melodeon. However a couple of years ago I tried to learn the trombone and this evoked abject terror. She got out the house and ran off down the road. Any sort of trumpeting noise startles her. She cant cope with trombones or tubas, and ran away while I was playing at a street fair when a tuba joined in. It must rattle their ear drums something horrible!