Dogs, cats birds, fish and even horses are increasingly being used in settings ranging from hospitals and nursing homes to schools, jails and mental institutions. ….studies have been focusing on the fact that interacting with animals can increase people’s level of the hormone oxytocin.
“That is very beneficial for us,” says Johnson. “Oxytocin helps us feel happy and trusting.” Which, Johnson says, may be one of the ways that humans bond with their animals over time.
… “Oxytocin has some powerful effects for us in the body’s ability to be in a state of readiness to heal, and also to grow new cells, so it predisposes us to an environment in our own bodies where we can be healthier.”