spot on mate,but some days if your unable to let them out for a few days to graze on grass,then i always have some on standby,i have about 20 seed trays,the ones about a foot and half and i put a thin layer of compost in and then sow different seeds in em,like salad leaves and grasses,i even do a few with the british finch mix and then just put them in,they dont half rattle em
Great stuff