[SimonandSyril]

If your hamster is behaving fine then you are probably alright. If I were you I would do a basic health check.
1. Check the behind to see if there is any swelling or unusual discharge
2. Check the Nose for any discharge
3. Check the ears for crustiness and discharge
4. Check the teeth they should be yellow not white.
5. Check the eyes for discharge.
If you see any bad signs go straight to the vet.