OK, around a half cup per bird per day. Oh wow are they going to be ticked off! I don't remember where I read the chickens will not over eat. Whoever it was never met my chickens.
Chickens
will not over eat if fed a complete and balanced diet, keep in mind that chicken eat to fill there energy needs not to fill there stomach. If your chickens are eating a lot of feed, acting like there starved when you feed them that means that there is something wrong with the ration your feeding most likely it is a low energy or a very incomplete feed.
Here is a examples of amount of Metabolisable Energy a commercial type egg laying bird should be receiving per day.
(Note - Most hatchery type chickens fall under a commercial type egg laying bird)
0 - 6 week should be getting a Metabolisable Energy amount of 2750-2970 Kcal/Kg
6 - 12 weeks 2750-3025 of Metabolisable Energy
12 - 15 weeks 2700-2970 of Metabolisable Energy
15 - Prod. 2725-2980 of Metabolisable Energy
Laying hens that are
1 - 32 weeks laying 2770-2860 Kcal/Kg of Metabolisable Energy
32 - 44 weeks laying 2725-2860 Kcal/Kg of Metabolisable Energy
44 - 55 weeks laying 2675-2860 Kcal/Kg of Metabolisable Energy
> 55 weeks laying 2550-2825 Kcal/Kg of Metabolisable Energy
Quote: The hens' feed consumption rate is governed by several factors, including body weight (or age), rate of egg production, egg weight, effective ambient temperature, feed texture, dietary nutrient imbalances, and
dietary energy content. The latter is especially important, because hens tend to increase or decrease feed consumption to maintain energy intake within a given range determined by the hens' physical capacity for feed intake. In other words, hens will attempt to consume more of a low-energy diet than of a high-energy diet. Only in special cases (such as nutrient imbalances or marginal salt deficiencies) will the hens adjust their feed consumption to meet their needs for specific nutrients, but usually not with great accuracy.