Oh man, do I feel stupid now. I thought we could only have a max of two mines! I never even looked to see if I could buy more. Perhaps I could gave gotten my pasture farther along than level 7 if I had figured that out. Early on, I realized that I would not get enough pelts in time to fully upgrade the pasture. I did craft two lynxes, and could actually craft a third as I have 25 extra pelts on hand right now, but who knows how much further I could have,gotten if I'd had two more mines! Ah well. At least I know now for future events.