I have my 50(+?)lb dog in a Pet Buckle (in theory ) but he gets car sick easily, and the pet buckle always pushes him over the edge. I think it might be because he has no freedom of movement because I'm just using the seatbelt. Would the kwik connect tether be worth it? He sits in his own bucket seat in the back, and stays calm in his seat. He just needs the freedom to sit up or lie down easily, depending on what his tummy needs.