We start out w/ this very syncopated groove that continue throughout the song, from the horn line. This kind of carries the melody and rhythm.
the verses in black cow are interesting. each verse has two asymmetric phrases, the first one 7 measures, and the second one 9 measures. The development is added by layering voices onto the main melodic line. This changes the texture and gives contrast to the song. The harmonies are pretty straightforward, and play around with a lot of jazz chords.