Noise Sensitivity and Pain in Dogs

Turns out, your dog’s fear of fireworks and other loud sounds might also be related to the fact that their noise sensitivity is actually painful for them. A 2018 study about noise sensitivities in dogs gives us information that could improve the quality of life and well-being of a lot of dogs. The research suggests that pain can be a cause of new noise sensitivities, especially in older dogs.

Signs of noise sensitivity in dogs

Some common signs of a dog’s sensitivity include cringing, trembling or retreating, but pet parents may be less able to identify signs of fear or anxiety when behaviours are more subtle. For example, dogs could pant, lick their lips, turn their head away or even stiffen their body. Sometimes their ears will turn back, and their head will lower below their shoulders. “We know that there are a lot of dogs that have noise sensitivities, but we underestimate their fearfulness to noise we consider normal because many dog owners can’t read body language,” says Emma Grigg, a research associate and lecturer at the UC Davis School of Veterinary Medicine.

“Dogs use body language much more than vocalising and we need to be aware of that,” says Grigg. “We feed them, house them, love them and we have a caretaker obligation to respond better to their anxiety.”

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Researching noise sensitivity in dogs

The study compares two groups of dogs who both had sound sensitivities of various kinds. Dogs in the study all had fearful responses to sounds such as cars, planes, gunshots, motorcycles, fireworks or thunderstorms. One group of dogs had also been diagnosed with a pain condition, while the other group contained dogs who were apparently free of such pain. (It’s hard to know for sure that a dog is pain-free, but these dogs had been evaluated and not found to be in pain.)

The two groups of dogs were generally similar in age, spay/neuter status and temperament, and did not vary substantially by breed. All were referred by other vets to the specialtist clinic where the research was conducted.

There were some really interesting differences between the two groups of dogs:

• The dogs in pain had a later onset (nearly four years) of reactivity to noise.
  

Noise sensitivity and pain in older dogs

Researchers hypothesise that a dog startling in response to loud sounds may exacerbate pain. The resulting muscle tension or sudden movement may aggravate tender areas of the body, therefore creating an association between loud noises and pain, which could lead to the development of a fear of such sounds. They reasonably assume that pain is more likely to develop as dogs age.

It has long been known that when older dogs suddenly become aggressive, especially to other dogs, that pain may be the cause. Chasing, wrestling and other behaviours common during play can increase pain in a dog with an injury or other physical issue, causing the dog to avoid such behaviour and react negatively to dogs attempting to initiate play.

In the early years of my work with dogs with serious behavioural issues, I observed that many older dogs became thunderstorm-phobic or developed noise sensitivities that seemed out of character, and I wished that I knew why. I wondered if changes in the amygdala or other parts of the brain associated with fear could be a factor. The idea that pain can play a role in developing new fears makes sense, and that is more likely to happen to older dogs because they are more likely to have physical issues that cause pain. We have long known that the sudden onset of aggression and other behavioural issues is often a clue that pain is a factor, especially in older dogs.

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Treating the source

All of the dogs who were in pain except one improved substantially with treatment, confirming the researchers’ assertions that prognosis is excellent once the role of pain is identified and the case managed accordingly. (The pet parent of the one dog who didn’t improve chose not to use analgesics to alleviate the dog’s pain.) Once the pain is managed, it’s often still necessary to use behavioural techniques to help dogs overcome the learned associations with loud noises.

The recommendations based on the work are:

• Older dogs who become noise sensitive should be routinely assessed for pain.

• Analgesics or other pain management strategies should be considered.
  

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Hopefully, the insights in this work will encourage practitioners to explore pain as a possible culprit in older dogs who develop a fear of loud noises. The more we understand dog behaviour – dogs in general as well as each dog as an individual – the better we can care for these wonderful creatures who share our lives and our hearts.