There is a place in Clarence, NY (if anyone is close) called Whitetail Scents. She has a deer farm and you can get fresh scents. She extractst them almost daily. I would say there is a huge difference since i started using those vs. the crap you buy at a commercial store (walmart, cabelas, etc.) like Tinks, etc. Not that I make a habit of it, but I do actually smell the urine I have bought from Whitetail Scents and it doesn't have much odor. The stuff you buy in a store is rancid and nasty. I also rattle. I agree, deer are curious. I have never had much luck wiht calls though. I have grunted with a deer standing right in front of me and he didn't even turn his head.