Why is my dog suddenly sensitive to noises they used to ignore?

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The short answer!

Sudden noise sensitivity often develops after a single frightening event creates a negative association. Age-related changes, pain conditions, or medical issues like cognitive decline can also lower a dog's tolerance for previously manageable sounds.

The most common trigger is a single negative experience. A dog startled by fireworks while already anxious, or frightened during a thunderstorm, can develop lasting fear that generalises to other loud sounds. This process, called sensitisation, means the fear response strengthens rather than fades with repeated exposure (1).

Age and pain amplify sensitivity

Older dogs experiencing cognitive dysfunction struggle to regulate stress responses, making previously tolerated sounds feel overwhelming. Chronic pain also lowers the threshold for anxiety - research shows dogs with ongoing discomfort are significantly more likely to develop noise fears, as pain amplifies emotional reactivity (2). Joint stiffness, dental issues, or digestive problems can all contribute.

Hearing changes create unpredictability

Some dogs with declining hearing become more noise-sensitive rather than less reactive. When sounds are distorted or arrive without warning, each loud noise feels more startling because the dog cannot anticipate it.

Medical factors to consider

Thyroid imbalances, neurological changes, or ear infections can trigger sudden behavioural shifts. If noise sensitivity appeared abruptly without an obvious triggering event, or if your dog shows other changes like appetite loss, confusion, or altered sleep patterns, a vet check helps rule out underlying medical causes.

References

  1. Riemer S. Therapy and prevention of noise fears in dogs. Animals. 2023;13(20):3238. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC10604364/
  2. Sherman BL, Mills DS. Canine anxieties and phobias: an update on separation anxiety and noise aversions. Vet Clin North Am Small Anim Pract. 2008;38(5):1081-1106. Available at: https://pubmed.ncbi.nlm.nih.gov/18672155/

This content is for general information only and does not replace veterinary advice. Supplements and nutritional products are not licensed veterinary medicines. Always speak to your vet before making changes to your dog’s diet, supplements, or care routine.

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owners also ask

What's the difference between noise sensitivity and hearing problems in dogs?

Noise sensitivity is a behavioural fear response to loud sounds, while hearing problems involve physical changes to the ear or auditory system. A dog can have normal hearing but fear noises, or have hearing loss and still react fearfully.

Can calming supplements help with my dog‘s noise sensitivity?

Yes - some calming supplements may help reduce noise sensitivity by supporting emotional regulation.

What are the best calming aids for dogs‘ fireworks sensitivity?

The most effective calming aids are multimodal, and combine environmental management, behavioural techniques, and supportive products such as supplements.