I just bought a flying saucer wheel for my two chins and I put it in their cage last night for the first time. I watched them for a while to see how they would react to it, and it seemed like they were both really freaked out by it - like it was a huge scary invader in their house. Monk did jump on it and would run on it awkwardly right from the beginning, but he would look freaked out the whole time and then would fly off of it and lay flat on his stomach under the wheel with his chin on the floor.
Leon was very interested in the wheel, but it was like he was trying to figure out if it would attack him. He wouldn't climb on it from the floor of his cage. Instead he would hop up to a higher shelf and then jump down onto it as if trying to ambush it, and each time it would of course just sling-shot him to another part of the cage immediately. He would frantically squirm under the wheel and behind it, even while Monk was running on it. Leon would get stuck like this, once with one little arm stuck sticking up above the wheel, and I was afraid he was going to get hurt. They also both would stand on the floor of the cage and put their teeth against the side of the wheel as it was still spinning.
Then Leon, who is very friendly but hasn't yet come around to jumping into our hands and letting us hold him, would desperately want out of the cage and when we would open the door he would jump right into our arms and want to be carried around. We would pet him and try to reassure him (all the while amazed that he wanted us to hold him and pet him for the first time ever) and then put him back in the cage with his brother and the wheel. One of the times that we opened the cage door, he immediately hopped out to the floor and hopped into our bedroom - He has NEVER EVER gone loose in our apartment before! He has always been too scared to be that adventurous.
When we put him back in the cage, he went to the ledge in the corner of the cage that was farthest opposite the wheel and laid down flat on his stomach with his chin resting on the ledge, just like Monk had done under the wheel. Monk came and joined him on the ledge and they seemed to be fighting to be the one squished furthest into the corner, farthest from the wheel. And they both wanted out of the cage really badly.
We took the wheel out because I couldn't tell what exactly was going on with them and it seemed extremely stressful for them. (And I was going to sleep and didn't want something to happen to them in the middle of the night.) Is this normal? Has anyone had this happen and knows what this means? I can't tell if it is too stressful to have the wheel in there.
The other thing is that I am afraid their cage might be on the small side for the wheel. The way Leon was squishing himself beside the wheel and the back and side wall of the cage concerned me. Also, whenever Monk or Leon would fly off of the wheel, they would be thrown against something else in the cage, like their box house. I think they will love the wheel once they get used to it, but I definitely don't want anyone to get injured.