Chow Chows have one of the biggest lifespan ranges I’ve seen with the average being anywhere from 8-12 years. Meanwhile, ones kept on a healthy diet and who aren’t predisposed toward some of the more common health issues get a slightly more generous one which ranges from 9-15. Regardless, I’d zero in on the first number as going up to year 11 or 12 is usually the standard for a dog breed like the Chow Chow given his brachycephalic nature and the problems that are likely to start coming up in his older age.