The mail carriers are staying busy in Cary. Two weeks ago, Phoenix Assisted Care put out a request on social media for pen pals, and now two weeks later, they're averaging about 3,000 letters a day. Donna Horton, administrator at the care center, said employees are working eight hours a day sorting through letters and packages.Horton said it has brightened the lives of residents.The overwhelming support is leaving some residents thinking there is enough to go around to other care facilities.