

Is this wheel too small? It’s at least 15 maybe 16 inches
Context: got it from another rat owner, just put it in today and photo is one of my rats using it for the first time/getting used to it, could that be why his tail is a little curled since he might’ve been uncomfortable with this random moving sphere he discovered? I’m rlly worried now bc I was so lucky to get this wheel for free and I can’t afford one otherwise. Do I need to get rid of it?