- Monkey Lookout
Personally I would give them at the very least all day access to food - they need all the food they wish if they are to grow and be healthy.
I have feed available 24/7 until they are feathered in enough to go outside. Once outside, by about 4 weeks old, they only have access to feed during the day. At night the feed comes in, so that I'm not feeding the mice and rats.
For chicks with a broody hen, it's pretty much the same until they are big enough to start roosting with momma. They sleep in the crate they are brooded in with food and water. Once they are roosting, that's my cue for no more feed overnight.