Rug Dut

Ever since we got Miss Lucky, Lawson has clearly called her Rug Dut. Don't know where he gets Rug Dut out of Lucky, but that's what he has always called her. He has good pronunciation with other words, but for some reason he says Rug Dut instead of Lucky.
Sadly to say, sometime now me and Lincoln also call her Rug Dut. Lawson has also always called the kennel crate the Sha Sha. Some of you have witnessed, Lawson has full control over Miss Lucky, and she listens to his every command. So, if Lawson tells her SHA SHA RUG DUT, she runs right into her kennel. I guess they speak the same language.