Dogs Get Freaked out by "Law and Order" Theme Song

Apparently, the Law and Order theme song pisses off a lot of dogs. A quick YouTube search reveals dozens of videos recorded by dog owners who observe their pets flipping out when the TV show theme music begins. Does the tune contain a hidden frequency that only canines can hear?
A special nod to nastynets contributor Joel Holmberg who started it all by making this grid of 35 youtube videos of dogs reacting to the song. Joel tells Boing Boing "[I created it] when I was home visiting my family over christmas and noticed my family dog, Velvet, freaking out to theme song."