This is huge and a lot more than you may think. We just wanted durable, nice looking and EASY to clean. A wheel is mandatory. A wheel that doesn't squeak is a dream. They run from 1-3 miles a night. Good wheel, no problem. A very creative owner has made a wheel counter you can buy from him at runheggierun.com. It's inexpensive and attaches to the wheel. He will explain it to you. His hedgehog is tracked and the revolutions converted to miles and put on a map. In 3 months his hoglet had run from here to Kansas City. Call him for the detail. Visit him. They explore and have a good time. We have thermostats that attach to the outside of the cage to measure temperature. You can get here. Must be between 75-85 degrees. This is where our pockets come in handy or whatever you decide to create. We use and sell cage attached stainless steel water and feed dishes. They cannot flip them over at night and make a mess. We also designed and make wheel covers for your ease. Easy take off and put a new one on. Washable and last a long time. SOMEONE CHANGED THIS PART OF THE WEBSITE AND IT WAS INCORRECT UNTIL NOW. I WILL ADDRESS MY HOST ON THIS MATTER. I GUESS IDIOTS HAVE TOO MUCH TIME ON THEIR HANDS.