A recent study analyzing over 500,000 dogs in the UK found that breed, size, and facial structure significantly affect canine lifespan. Smaller dogs with longer noses, like Shiba Inus and Tibetan Spaniels, tend to live the longest, while larger breeds such as the Caucasian Shepherd Dog, Presa Canario, Cane Corso, Mastiff and Saint Bernard have the shortest lifespans. The average lifespan of a dog in the UK is about 12.5 years, with the risk of early death being 20% higher for larger dogs. Although female dogs often live longer than males, face shape is a more significant factor in longevity. The study, published in Scientific Reports, underscores the need for further research on breed-specific lifespans.