Not sure what I am

I am Baxter. My grey haired old human also calls me magnet because of the way I stick to him and his adult son. I have recently been adopted by my humans, Robin (old guy) and Eric (son) who were told I am a border collie/pug mix. My human has been investigating me and thinks I might be a border collie/pit bull mix because I am full bodied and kind of a jerk at times. My adoption was from a family that had rescued me, so not a lot of information has been forthcoming. Can anyone add suggestions as to what mix I may actually be?