[cypher]

I think it may well be the hormones kicking in with the girls!
They probably have no idea why they do it but just get the urge to create a bigger better nest every few days & make a few nice hoards (& in Whisp's case pee on them to keep them safe) just in case they're needed!

Zeki does a fair bit of scratching around & makes digging sounds but everything still remains all neat & tidy too, a few very neat burrow holes around the cage but that's about it.