Unlikely Friendship

Our grandson goes out with my husband every morning, before breakfast, to feed and water the chickens, ducks and goats. It takes a bit of doing as the hose doesn't reach out there so they pull a wagon loaded with a big bucket of water. For some reason, this chicken likes our grandson to pick her up to be petted. It is always the same chicken. She doesn't seem to want anyone else to pick her up, just him.