Thanks Marci
adamclark18, Thats what Asriel did when Hermione kept bullying him just kept running in his wheel, it was the only time she wouldn't chase him around or attack him i removed him because it wasn't fair he could hardly eat without her snatching it off him.
I've now had to separate another two and still there is problems. They are mostly chasing each other but it seems more aggressive and i'm worried if one catches another it will turn into a nasty incident
I do agree with Nick this is a winter issue, mine have done the same every autumn/winter since 2009 when they first started living outdoors and during the spring and summer i hardly had any problems.
Adam, tried to watch your video its not working for me