Dogs’ extraordinary sense of smell is well documented, but recent research has revealed just how efficiently companion dogs can apply scent memory in everyday contexts. In a study published in Pet Behaviour Science, Adams (2022) adapted a detector dog training method to evaluate how quickly pet dogs could learn and recall scents with no prior experience.
Dogs were trained to recognize the scents of prey animals through a fetch-based chase-and-sniff routine. After two consecutive nights of sleep in their natural home environment, they were tested for both declarative memory (remembering what the scent was) and procedural memory (remembering how to locate it). Results showed that all dogs retained the scent identity, and most could also recall the correct location of the scent, even when distractors were present.
Interestingly, when dogs were deprived of their daytime and evening naps but kept active with stimulating tasks, they still showed no reduction in memory performance, suggesting that their short sleep–wake cycles and strong motivation compensated for the altered rest pattern. Sleep monitoring confirmed that dogs displayed normal cycles of NREM and REM sleep, with no significant differences in session length or REM latency compared to undisturbed sleep conditions. The findings also hinted that older dogs did not exhibit reduced REM sleep when observed at home.
This research highlights not only dogs’ remarkable olfactory memory but also their potential sense of self, as the study applied memory criteria commonly used for humans. It further suggests that motivated owners could adopt similar playful, scent-based training routines at home to engage their dogs’ natural abilities and reinforce learning in a practical, rewarding way.
Source: Adams, G. J. (2022). Detector dog training shows companion-dogs rapidly remember the what and where of instinctively significant scents. Pet Behaviour Science. Published August 2, 2022.
