The amount of food I should feed my chicks.

[tiffyme]

For 3 week olds I would only give them the starter, if they are outside for periods they will find other stuff then. I always free feed, keep feed there all the time so that they can take what they need when they need it. The needs can vary bird to bird, and day to day, so it's better if it's always there, along with plenty of fresh, clean water.

So basically feeding them other things than "chick starter" are optional?

 

[Doc7]

So basically feeding them other things than "chick starter" are optional?

yes

 

[tiffyme]

yes

Do you have any suggestions like what can I feed them as "snacks" every once in a while?

 

[humblehillsfarm]

Yes you can feed them the things you mentioned as a snack. Snacks are a good way to train them to come to you when you call! Leafy greens and fruits, they can be given in nearly unlimited amounts. Extra grains and seeds should be no more than a handful a day for 3-4 birds, or 2-3 handfuls for 4-8 birds.