Hi all!
I haven't been posting at all, but I've been reading avidly; just wanted to thank you all for all the great information I get from this site, and I love seeing all the chin pics!
I was wondering if y'all think it'd be okay if I put a cement block in my (getting him tonight!) new chin's cage. It's fairly small and square, but has a hole through the middle that's roughly chinchilla-sized.

It's been very hot here the past few days, and I thought that inside the cement block would be a bit cooler than his wooden house. I know clay's okay, but wasn't sure about cement; do you think there'd be any problems? It's not particularly crumbly, but does have kind of rough edges.
Thank you!