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Related Experiment Video

Updated: Dec 27, 2025

Assessment of Sensory Thresholds in Dogs Using Mechanical and Hot Thermal Quantitative Sensory Testing
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Dogs can sense weak thermal radiation.

Anna Bálint1,2,3, Attila Andics4,5, Márta Gácsi6,4

  • 1Lund University, Department of Biology, Mammalian Rhinarium Group, Sölvegatan 35, 22362, Lund, Sweden. nani.balint@gmail.com.

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|March 1, 2020
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Summary

Dogs can sense radiating heat through their cold noses, a previously unknown sensory ability in carnivores. This discovery opens new avenues for understanding canine sensory perception.

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Area of Science:

  • Zoology
  • Animal Sensory Perception
  • Neuroscience

Background:

  • The dog rhinarium, the naked skin on a dog's nose, is richly innervated, suggesting a sensory role.
  • Carnivoran rhinaria are notably colder than those of herbivores, hinting at a unique thermal sensitivity.

Purpose of the Study:

  • To investigate the hypothesis that the cold dog rhinarium is sensitive to radiating heat.
  • To explore a potential novel sensory modality in canids.

Main Methods:

  • Behavioral experiments trained dogs to differentiate objects based on radiating heat.
  • Functional magnetic resonance imaging (fMRI) was used to observe brain activity in dogs exposed to thermal stimuli.

Main Results:

  • Dogs demonstrated an ability to distinguish between objects based on radiating heat.
  • fMRI revealed increased neural activity in the left somatosensory association cortex in response to warm stimuli.

Conclusions:

  • The dog rhinarium possesses a previously unrecognized sensory function for detecting radiating heat.
  • This finding expands our understanding of sensory modalities in carnivoran species.