Every dog year not equivalent to seven human years, scientists find

Study of DNA changes in labradors suggests puppies age much faster than older dogs

Dogs do not simply age at seven times the rate of humans, scientists have found in a study that reveals young dogs might be older" than previously thought.

The findings suggest a one-year-old puppy is actually about 30 in human years" - an age when humans, at least, might be expected to have stopped running riot with the toilet paper.