1. Ears: Pay attention to your dog's ears. If they are perked up and pointed towards the source of the music, it's a sign that they are interested and engaged.
2. Body language: Observe your dog's body language. If they are swaying their tail, wagging their hips, or moving their whole body to the rhythm of the music, it's a good indication that they are enjoying it.
3. Head nodding: Some dogs express their enjoyment of music by nodding their heads along with the beat.
4. Licking or biting: A dog may lick or gently bite you or other objects near them as a way of expressing contentment and happiness.
5. Relaxation: If your dog appears relaxed and calm while listening to a particular song, it's likely that they find it soothing and enjoyable.
6. Proximity: Notice if your dog seeks out proximity to the source of the music. If they move closer to a speaker or device playing the song, it's a sign that they want to be closer to the source of the sound.
Remember, each dog is unique and may express their enjoyment of music in different ways. Pay attention to your dog's overall behavior and observe if there are consistent patterns when they hear certain songs or tunes.