10/10/2026
"A chihuahua might be at a disadvantage in paw-to-paw combat with a Great Dane, but being little has its benefits: a sweeping analysis of dog breeds has found that small pooches tend to age more slowly than large ones, and big dogs might have rogue ‘jumping genes’ that hop around the genome to blame."
Study of almost 900 dogs from roughly 120 breeds finds that rapid ageing of large canines is linked to changes in the epigenome.