I too am seeking ferret wheels for my little girl. I started trying to build the DIY over six months ago. I enlisted someone's help, and it is still not done - maybe because we are trying to modify it. Anyway, she loves being out in the house "walking" but has good and bad times with it. She really needs exercise. She's still a curious lady. She is arthritic but otherwise disease free - (well borderline low blood sugar at times but never severely affected by it). She turned 7 years old in January. She is small: 6 inches from back of front legs to front of back legs. Can anyone help? Cathy M [Posted in FML 7832]