I was a falconer before I had mink, so yes a lot of the training principles I use stem from falconry. I didn't use weight to begin with as mink aren't as lazy as hawks and will often work even when a little too fat. Then later I used weight loosely to get an idea of where the mink was at. Starting this summer I've started to weigh my mink religiously, and I find it gives me a lot more control and insight as to why the mink behaves as it did during a certain training. Part of the reason I didn't use weighing from the beginning was also the difficultly of getting an accurate weight on a mink. Mi