DD would like another hamster, our much loved Syrian died a couple of years ago. She is 11 and will need to keep them in her room as we now have cats. Syrians are noisy so I'd like a smaller species. What are Roborovskis like, or Chinese hamsters? Didn't want a Russian as they are cross bred and prone to diabetes. Our Syrian had a massive hamster heaven cage, can the smaller breeds do ok in a Duna fun or similar? I understand the cage bars need to be narrower. Thanks!