Just switched from live grass to hay feed. Live grass seemed like a great idea but... It smelled, attracted bugs, and my sulcata dug most of it up anywho. He seems to friggin' love the hay, mostly orchard grass, he burrows intricate tunnels and chows down on the stuff. Not to mention it's about 3 bucks for a bail, which has covered 24 square feet twice and I still have more than half left. It's my new best suggestion for substrate, for sullys.