How much and how often
A common guide is about 10–12% of body weight per feeding. Frequency drops as chicks grow: newly hatched chicks may need feeding every 1–2 hours around the clock; by a couple of weeks, roughly every 4–5 hours; older chicks, 3–4 times a day, until weaning. Let the crop empty between feeds.
Safety essentials
Formula should be freshly mixed and warm (about 104–106°F / 40–41°C) — too hot burns the crop, too cold slows digestion (crop stasis). Feed slowly to avoid aspiration, and weigh the chick daily to confirm steady gain.