So, I finally got the right kind of sand in the run. Scraped out the old, stinky wet stuff, dragged in the new stuff with the bigger particles. Spread it all out -- got all dusty and dirty. The run was so fresh and lovely, and I was so happy to have it done. I put the girls back in so I could go trick-or-treating, and they would NOT walk on that new sand. Took me 10 minutes to lure them in through the back door to the run. The back part of the run doesn't have the new sand since it didn't get soaked in the rains. They seem determined to stay put in the part of the run with old sand. They wouldn't even walk over the new sand to get to bread or sunflower seeds -- their favorite treats! I'm sure they'll eventually come on over, but I was so surprised. Have you seen this kind of behavior before?