Barry had an incredible sense of smell, such that he could smell out people buried in the snow. Like other St. Bernards, Barry was trained by the monks at the hospice to rescue travelers who became lost while hiking through the unrelenting terrain of the Alps. Many times he’d find someone who had laid down in the snow in exhaustion and he’d lie on top of them to warm them and lick their faces repeatedly to wake them up.

Sources

Barry (dog) - Wikipedia

Meet Barry, The Saint Bernard That Could Save You From An Avalanche – Top Dog Tips

Barry the St Bernard: from farm dog to national hero - SWI swissinfo.ch

https://www.theparisreview.org/blog/2017/01/10/saint-of-saints/

Barry - Students | Britannica Kids | Homework Help

https://www.nmbe.ch/en/exhibitions/barry