Yep, cattle cults are common around the world. You can see them in places like Yemen or the corbeilles in Saharan Africa. All I can say is we know one of the horns appears to have burning inside- almost like it was a torch. But we also find little hearths inside the mustatil, so that could be why. Unfortunately, we can’t answer the question as to whether the horns were used elsewhere first. I’d doubt it but you can’t discount it. We just gotta dig more!!!