Penny - Missing Sheltie/Chihuahua Mix at Red Rocks Amphitheatre

My dog Penny is still missing. I would really appreciate anyone sharing her info to get the word out. She's a sheltie/long-haired chihuahua mix, 18 lbs., 2 years old, and was wearing a purple harness & pink collar when she got loose. She was last seen at Red Rocks Ampitheatre in Morrison, CO yesterday at 10 am. If you have any info, please call Mattie at 610-842-2181 asap. Thank you.