I often wondered about a connection between human musical expression and the animals themselves. Then I started observing birds and squirrels, especially around various types of music. For instance, when I lived in my last apartment in Seattle, I befriended a family of squirrels. These squirrels would find delight in listening to Rachmaninoff's Piano Concerto #3. At first, I thought hmmm, what a coincidence. But every time I played that piece of music on my CD/cassette player, the squirrels would run back and forth on the roof and even let out gleeful cries, if no better words to describe the experience.
They also like traditional guitar music from the Dominican Republic. The music matched the energy of the squirrels. The crows didn't go for Rachmaninoff, but they would sit in the trees listening to bagpipe recordings. But neither the squirrels or the crows enjoyed an atonal piece of music by Maurice Ravel (thankfully Ravel's only piece like that). When I played that musical piece three times, the crows and squirrels knocked over the water dish in the backyard and the crows actually dive bombed the house. Okay, already, I get the message.
So next time you play some tunes, either a recording or live, watch the animals and observe how they respond. Personally, I find this animal-music connection fascinating.