sounds perfectly reasonable hamster behaviour to me Rhona
:P who are we to even begin to imagine what goes on in their heads sometimes, but hey it is all part of why I love these guys so much. Hours of entertainment and wonder for hamster owners worldwide when our little ones start to get on in months (and hopefully years).
It is very correct to always be vigilant and any health concerns should be discussed with a vet as you did when you first started to see a change in Fudge's behaviour. He sounds like a nice, tidy boy which is unusual as most of my boys are messy tikes. The girls are the clean ones in my house.