Smaller dogs may live twice as long life as their larger counterparts. But does this size difference also impact how dogs age in terms of behavior and cognitive abilities? Based on the data of 15,000 dogs, researchers from ELTE Eötvös Loránd University, Budapest, found that larger dogs experience an earlier onset of age-related decline (at around 7–8 years of age versus 10–11 years in smaller dogs), but also a slower decline rate compared to smaller dogs.
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Source: Phys.org