Back when I was attending college, my roommate had a dog named Max. Whenever a particular Springsteen song came on — it had a certain pitch or tone that seemed to reach him in a way nothing else did — Max would lift his head, and then he'd start to howl. He was not in distress, it was more like something that felt like a response, like he couldn't help but howl. It would crack us up. It was the first time I remember thinking that there was something in the DNA of animals that produced an auditory reaction deeper than training or habit.
I had also wondered how music affected horses. Leaving a radio on in the barn — something steady and low in the background — is common practice, but was the music actually doing something for the horses, or were we simply projecting our own sense of comfort onto them? Years later, those observations sent me down a rabbit hole searching for answers.
As it turns out, animals do not respond to music the way humans do. They experience it through their own biology, hearing range, and emotional wiring.
The Foundational Idea: Species-Specific Music
Animal psychologist Charles Snowdon at the University of Wisconsin-Madison conducted research in this field and noticed something curious: most animals seem largely indifferent to human music, even carefully chosen classical compositions. His explanation? We've been playing them the wrong type of music.
Snowdon proposed "species-specific music” compositions built from the pitches, tempos, and tonal patterns native to a particular animal's own vocal world. If an animal's hearing range and communication style are fundamentally different from a human's, music written for human ears may simply not register in a meaningful way. When researchers started composing music tuned to an animal's biology instead, the responses changed dramatically.
Find out which domesticated dog breeds are genetically closest to wolves.
Dogs: The Living Room Wolf
To understand why Max howled at that record, you have to start with wolves. Howling isn’t random noise, it’s a sophisticated form of communication that helps packs locate one another, signal territory, and strengthen social bonds through a shared chorus.
That ancestral wiring still exists in domestic dogs, which is why Max responded to the sustained pitch of the record as if it were a distant howl. This “social facilitation” effect, the instinct to join in with a shared sound, is the same phenomenon that causes humans to naturally join singing, chanting, applause, or laughter. In both dogs and humans shared vocalization strengthens social bonds through emotional synchronization; when one voice starts, others instinctively join in. For dogs and wolves, howling signals that the pack is whole, and may even trigger endorphins like the emotional lift humans feel when singing together.
Context matters when reading a dog's response. A dog howling with a loose, wagging body and relaxed ears is almost certainly engaged in something pleasurable. A dog that is pacing or flattening its ears is more likely stressed; and turning the music off is the right call. And sometimes, a dog has simply learned that howling makes its humans laugh and reach for a phone. Positive reinforcement is a powerful motivator.
Genre matters, too. Psychologist Deborah Wells at Queen's University Belfast found that classical music was associated with calm behaviors — lying down, resting, reduced vocalization — while heavy metal produced agitation and anxiety. A study from the Scottish SPCA and the University of Glasgow found that soft rock and reggae produced the greatest reductions in stress, with individual dogs showing their own distinct preferences. For dogs, music with lower frequencies and slower tempos that mirror a resting canine heartbeat tends to be the most settling — whether in a kennel, a car, or a thunderstorm.
Cats: Tuned In to Their Own Frequency
Cats are largely indifferent to the music we play. Classical, pop, ambient — studies repeatedly find that cats treat human music as background noise. It's not that they don't respond to sound; it's that human music simply isn't calibrated to them.
When Snowdon collaborated with composer David Teie to create music for cats — using sliding tones modeled on feline vocalizations, tempos mirroring purring rhythms, and frequencies within the cat's natural hearing range — the response was unmistakable. Cats that had ignored human music began approaching speakers, rubbing against them, and showing clear signs of relaxed engagement.
In a veterinary clinic setting, species-appropriate cat music significantly reduced stress behaviors during examinations compared to both silence and classical music. For high-stress situations — a vet visit, a move, a new pet in the home — species-specific feline music is worth exploring. Several albums developed directly from Snowdon and Teie's research are now commercially available.
Horses: Sensitive Listeners with Measurable Responses
Horses are prey animals built for vigilance. Their hearing range extends from roughly 55 Hz to 33.5 kHz — well beyond the human range — and their ears rotate independently to locate sound from any direction. Sound is not passive for horses. It is information, and they process it continuously.
A study of weanling horses found that music during stressful situations produced lower peak heart rates and a faster return to calm. Horses with music were more likely to be standing quietly and eating, less likely to be on alert. Research on Arabian racehorses showed reduced stress during saddling and measurably improved performance over the first three months of music exposure.
Classical and country music consistently appear as calming choices; jazz and rock have been linked to stress behaviors including stamping and head tossing. Low volume, steady rhythm, and shorter melodic patterns work best. Recent research also suggests classical music may stimulate serotonin release in horses, with lower stress levels linked to reduced risk of equine gastric ulcer syndrome.
Research increasingly points to a dual effect of music in barn environments: steady background music masks unpredictable noises that trigger a horse’s prey-driven flight response, while mellow music itself builds a lasting baseline of calm. Studies show horses exposed to low-volume classical or country music daily had lower heart rates and remained more relaxed during handling, saddling, and work, with the effects strengthening over time.
In practical terms, the barn radio that horsemen have left running for generations turns out to be doing two jobs at once — and the science now backs both of them.
What This Means for the Animals in Your Life
The research across all three species points to a few consistent principles. Tempo matters. Genre matters. And an animal's own biology matters more than our preferences. Dogs settle best with soft rock, reggae, or classical at a slow tempo. Cats largely need music written specifically for them to respond at all. Horses benefit measurably from calm, steady soundscapes — especially during the high-stress moments of their daily lives.
Sound is part of every animal's environment whether we're paying attention or not. Max never got a species-specific playlist, but somewhere in that Springsteen song was a frequency that spoke to something ancient in him — and that howl was his way of singing along.
References
Harrington, F.H. & Mech, L.D. - "Wolf howling and its role in territory maintenance." *Behaviour*, 1979.
Panksepp, J. - Affective neuroscience of the emotional BrainMind *Dialogues in Clinical Neuroscience*, 2011.
Wells, D.L. The influence of auditory stimulation on the behaviour of dogs housed in a rescue shelter."*Animal Welfare*, 2002.
Bowman, A. et al. The effect of different genres of music on the stress levels of kennelled dogs. Physiology & Behavior*, Scottish SPCA / University of Glasgow, 2017.
McConnell, P.B. "Acoustic structure and receiver response in domestic dogs." *Animal Behaviour*, 1990.
Snowdon, C.T. et al. - "Animal Signals, Music and Emotional Well-Being. PMC / NIH*, 2021.
Pet Acoustics / Boehringer Ingelheim. "The Science Behind Relax Trax. Equine hearing research, 2024.
Kentucky Equine Research. "Environmental Sound Enrichment Improves Equine Welfare." *Equinews*, 2025.
