14 1/2 is amazing. Most ordinary large dogs are lucky to make it to that age today. Could depend on where they live maybe, I'm sure sub-zero winters can't help the dogs living under those conditions unless it's in the husky/eskimo breed, they seem hardier as well as the mixed breeds like shep/husky or lab/husky.
4-5 cups of kibble daily. Must have to buy the kibble by the truckload.