I had a pack follow me once. There were at least twenty of them. It was dark out, but could make them out with little light on white sand. I tucked in the brush and went up a crook in a tree. They passed through under me at dawn, moving around in a meadow--none even looked up, yipped or sniffed the tree. So, I imagine if they were actually looking for me they could've smelled me and would've known I was up in the tree. So, not sure their intent in following for a few hundred yards.