This spring/summer my goats were giving more milk than I could keep up with so I decided to freeze some of it. I have subsequently tried to thaw some out (and then had to put it in the blender because it separated) and have tried to make yogurt (Salton yogurt maker/yogourmet starter) with NO success. It just wont set up. I made great yogurt with fresh milk this summer. Is it failing now because it has been frozen? Same goes for my chevre. It won't set up. Well, it'll set up a little, but not much. I just bought some new rennet (good quality, not junket) and chevre started because I thought that might be the problem--using old starter & rennet. But apparently not. I am frustrated! Any thoughts?