I've had 5 dogs in my lifetime that have lived to age 15+. All I do is take them to the vet yearly and feed them good quality dry dog food. Anecdotal evidence

I've had 5 dogs in my lifetime that have lived to age 15+. All I do is take them to the vet yearly and feed them good quality dry dog food. Anecdotal evidence should not determine whether to treat your dog (or any species) with medicine – particularly with a sample size of 5.