The food processor is a good idea actually, I think i'll try that.

Someone in the pet shop suggested taking the seed out after they have eaten in the morning and give them veg to snack on then replace the seed later to encourrage them to look for other food, is that safe to do?
Does the position that the veg is placed have an effect? In that I mean is it better hanging from the top of the cage rather than the side?
Thanks for your help!