Going grey due to stress and anxiety is an inseparable part of being human, but new research suggests we are not alone.
A pioneering study of dogs found has found that the famously loyal four-legged animals may be suffering exactly the same fate.
A survey of more than 400 canines established that going grey around the mouth and face was not only a sign of distinguished old age.
In just the same way humans with stressful jobs acquire the “salt and pepper” look at a younger age, dogs who had undergone a harder life were found to have acquired grey hairs earlier than those with a more care-free existence.
Scientists involved in the study, published in the journal Applied Animal Behaviour Science, said they had long suspected stress manifested itself in this way, but that finding evidence for the theory had been challenging.
The research involved visiting dog homes and veterinary clinics across the state of Colorado.