I have one cat that does this everytime I walk in the door! Surprisingly it is the latest feral rescue, Bo. As soon as she hears me open the door, she comes running. She doesn't hardly leave my side when I'm home. At night she's sleeping in the crook of my arm and won't move. If I move, she pulls me with her paws and purrs. She's the best thing that's happened to us (besides Bentley)!