Silent spinners are nice because they do not need to be lubricated. They are also constructed of nice, hard plastic.
Most gerbils wont chew these, because the plastic used is rather thick, but if they chew a hole in it, be sure to take it away, or there feet may fall in there and get hurt. Readily available, but really rather expensive!
Most gerbils wont chew these, because the plastic used is rather thick, but if they chew a hole in it, be sure to take it away, or there feet may fall in there and get hurt. Readily available, but really rather expensive!