Used by -- Customer supplied information for their personal use!
"I rehabilitate squirrels and chipmunks and must tell you that your 9" wheel with a 4 - 4.5" track is IDEAL for chipmunks (from young juvenile to large adult) ... all different species. Its a must have. Feel free to list or advertise this information. The 12.5" wheels are good for young grey or fox squirrels, safe and a lot of fun, but become too small and completely lose their interest as they age (say past 9 months) ... unlike chipmunks who can run in the wheels all day, squirrels quickly switch to climbing and in/out of cage acrobatics. MM.22240"