[cypher]

4 wheels lol! they are getting spoilt! The 4.5" is too small even for a robo really, do the bigger silent spinners work ok? Lots of people have had problems with the new ones so if it is a bit stiff they may struggle with it but then it could just be that they like a noisy wheel!

They sound to be settling in much better now, I think it should be fine to leave them for a while longer & just keep a close eye on things to see how it develops, hopefully they will sort things out between themselves without any fighting & live happily together, fingers crossed!