Yes animals do enjoy music. The output of milk production is increased by two to five liters by each animal when music system is installed in their compartment in Dairy dept.Yes it means they enjoy music.
I used to have a dog, since passed of old age, who even had preferences. Most songs made no difference, some she would move away from the speakers, some she would move closer to the speakers. I could never figure out what made the difference. But she DID enjoy some songs enough to get up and move closer.