I don't have feed out for them all the time as the darn birds come and eat it.
I feed them in the morning and then again at about lunchtime, they also get bread and fruit as an afternoon treat. they do free range a fair bit too and i always worry if I am feeding them enough, there is always feed left after the morning feed and the local bird population walks around very fat!! So I guess they are having enough - but they always run when they see me coming.