Thanks both.
Serendipity, that one you linked looks nice, but is too low. Mr Sweep would climb out of it in seconds! Would it be ok for indoor use maybe? Then it wouldn't need to be treated.
CMB, good point! Thanks. I guess if I was to use it then it would have to be with a base and for indoor use only
Those wire runs you can get for hamsters aren't tall enough. He would definately climb out. There are ones for rabbits which are taller but the bars are too far apart, but he'd probably still be able to get under it
I need to find something that he won't be able to get under!