Tessa has a rather odd tunnel quirk. She often runs to them, and into them, but then comes moseying out instead of running.
I had a theory and I tried it out tonight. Nobody else came to Dean's class, so after he had done his work on the course, I took Dean and Tessa out together and sent Dean into the tunnel. She not only ran in and ran out, but she kept right up with him. And Dean is FAST on tunnels!!
When this super hot weather breaks, I need to get my tunnel out and play with this a bit. Maybe she will learn to run in and out of the tunnels!!!