https://www.live-feeds.com/feed/big-dogs-age-faster-than-little-onesContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/big-dogs-age-faster-than-little-oneshttps://www.live-feeds.com/feed/big-dogs-age-faster-than-little-ones#u128547Sat, 17 Oct 2026 16:46:53 +0000Large dog breeds age faster at an epigenetic and molecular level than smaller breeds, according to a study published in the journal Science on October 8, 2026. Researchers found that body size affects the chemical tags regulating genes, specifically causing larger dogs to lose chemical brakes on jumping genes more quickly. This biological acceleration explains why large breeds typically have shorter lifespans than small breeds, a trend that differs from the general pattern seen in other mammals where larger species often live longer.Why it mattersCanine lifespan varies significantly by breed,