Chinese hamster

[Casey]

My Chinese Hamster urinates in her wheel, I have never had any of my other hamsters do this before. I don't know why she does it as she loves running in her wheel. Her sawdust is always so clean and appears unused when I come to clean her out. Why is she doing this?

[IggyB]

she's obviously very tidy and doesn't want to make a mess of her saw dust - what she needs is a toilet or another wheel so she can use one for a toilet and one for exercising - maybe.