I second the bacon but i chop it up fine a burn it in a skillet, let cool and pour grease and all into a small tupperware thing and shake it up. When the grease sets up it will come out in chunks. I also use grey fox urine but i dont think it matters. Actually, the only urine i can identify anymore is cat and yote. For fox sets, i just grap one and so far i am about even on reds and greys.
shane
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POSITIVE THINKING: It's the only thing keeping you from being naked on the roof with a deer rifle!