Mary Tyler Moore’s pit bull has a special gift, one that saves the TV icon's life every day. The dog can sense when the actress has low blood sugar, which is a potentially life-threatening side effect of type 1 diabetes. “He will come sit in front of me and just stare at me, until I get the idea,” Moore told Bonnie Hunt on her talk show this week. “I’ll go upstairs, do a little blood check and, sure enough, it’s low.”

Watch as she explains her dog’s amazing skill in the clip above!