Claire Thompson
Broiler chickens being raised for meat require a special diet to maximize growth. This includes a meat bird starter that is higher in protein—up to 22 percent—to encourage fast growth. Starter feed is typically given to chicks until they are between five and eight weeks old. After this initial starter phase, chicks enter the grower phase, where they are fed a diet with slightly less protein (16-18%) to support steady growth without promoting excessive weight gain. The grower phase lasts until the chickens are between 8 and 20 weeks old, after which they transition to a layer feed.
| Characteristics | Values |
|---|---|
| Starter feed duration | 0-6 weeks |
| Protein content in starter feed | 18-24% |
| Grower feed introduction | 6 weeks |
| Protein content in grower feed | 16-18% |
| Transition to layer feed | 16-20 weeks |
| Calcium content in grower feed | <1.25% |
| Layer feed protein content | 15-18% |
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What You'll Learn
Starter feed duration for chicks
The starter phase is one of the three primary growth phases that chickens go through, the other two being the grower phase and the layer phase. The starter feed duration for chicks is between hatch and 3 to 6 weeks of age. However, some sources suggest that the starter feed duration can be up to 8 weeks.
The starter phase is a critical period for a chick's development, as they begin to develop their digestive tract and establish their immune function. They also start to grow feathers, which are essential for maintaining body temperature. To support these physiological processes, starter feeds are typically high in protein, ranging from 18 to 24% protein content.
The duration of the starter feed period can vary depending on the breed of chicken and individual growth rates. It is important to monitor the chick's development and make adjustments as needed. Some sources suggest that the starter feed can be provided until the chick is about six weeks old, while others recommend continuing it until 8 weeks of age.
After the starter phase, chicks transition to the grower phase. The grower feed has a lower protein content, typically between 16 and 18%, to support steady growth and bone development without promoting excessive weight gain. It is important to make the switch to grower feed to prevent kidney or liver problems in later life, which can be caused by excessive protein consumption during the grower phase.
The duration of the starter feed for chicks is an important aspect of their nutrition and development. By providing the appropriate starter feed for the recommended duration, chick caretakers can ensure their chicks get a healthy start to life and transition smoothly to the grower phase when the time comes.
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Grower feed protein content
The protein content of grower feed is typically lower than that of starter feed, which usually contains between 18 and 24 per cent protein. Grower feed usually contains 14 to 18 per cent protein, although some sources recommend a range of 16 to 18 per cent, or even as low as 15 per cent.
The protein content of grower feed is designed to support the growth of young chickens without promoting excessive weight gain. As a chick matures, it doesn't need as much protein since most of its rapid growth stage is over.
For chickens raised for meat production, grower feed is sometimes referred to as finisher feed. This feed is high in protein and energy to promote weight gain in the final weeks before processing.
The exact protein content of grower feed can vary depending on the specific needs of the chickens and the rate at which they are maturing. For example, a grower feed designed for fast-developing poultry might contain up to 24 per cent protein.
It's important to note that the nutritional needs of chickens change as they grow, and the protein content of their feed should be adjusted accordingly.
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Broiler chickens' special requirements
Broiler chickens, or meat chickens, have special dietary requirements that differ from those of laying hens. Broiler chickens require a diet that is high in protein to encourage fast growth and weight gain. In fact, broiler chicken feed can contain up to 22% protein.
When broiler chicks are first hatched, they should be fed a ""meat bird starter" feed. This feed is designed to meet the dietary requirements of baby chicks and typically contains 20-24% protein. It is important to note that this feed is not suitable for newly-hatched laying hens, as excess protein can be detrimental to their health. The starter feed also comes in medicated and unmedicated varieties, with the former designed to prevent coccidiosis and other intestinal parasites.
After the first few weeks of the starter phase, broiler chickens should be transitioned to grower feed. This feed contains slightly less protein (16-18%) to support steady growth and strong bone development. The grower phase typically lasts until the chickens are around 16-20 weeks old, at which point they will start laying eggs and can be switched to layer feed.
It is important to note that the transition between feeds should be gradual, and it is recommended to mix the old feed with the new to ease the transition and prevent digestive upset. Additionally, broiler chickens should have access to food 24 hours a day to encourage maximum growth and weight gain.
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Transitioning to grower feed
As your chicks approach the age of six weeks, it's time to start thinking about transitioning them to grower feed. This feed is designed for chicks between the ages of 6 and 20 weeks. Grower feed has a lower protein content (16-18%) compared to starter feed, which supports their continued growth and bone development without promoting excessive weight gain. It also contains less calcium than layer feed, which is important to prevent kidney problems later in life.
The transition from starter to grower feed should be gradual to avoid upsetting the chicks' digestive systems. You can start by mixing the old and new feeds together, gradually increasing the ratio of grower feed over several days. Monitor your chicks' behaviour during this transition to ensure they continue to eat and behave normally. You can also add supplements, such as Chicken E-lixir, to their water during this time to ensure they're getting all the necessary nutrients.
The duration of the grower phase can vary depending on the breed and development of your chicks. On average, it lasts from 6 weeks until the chicks are approximately 16-20 weeks old, or when they start laying eggs. At this point, they will transition to layer feed, which is designed to meet the nutritional needs of mature laying hens. Layer feed contains higher levels of calcium to support strong eggshells, as well as a balance of protein, vitamins, and minerals to promote enhanced egg quality and production.
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Layer feed considerations
Age and Physiological Development:
The starter phase, which focuses on digestive tract development and establishing immune function, typically lasts between 3 to 6 weeks for most chicken breeds. After this initial period, chicks transition to the grower phase, which involves further growth and feather development. Around six weeks of age, it is appropriate to introduce grower feed with a slightly reduced protein content to prevent excessive weight gain.
Egg-Laying Stage:
The transition to layer feed occurs once hens start laying eggs, typically around 16 to 20 weeks of age. Layer feed is specifically formulated to meet the nutritional requirements of laying hens.
Calcium Supplementation:
Laying hens require sufficient calcium in their diets to produce thick and strong eggshells. A deficiency in calcium can lead to weak and thin eggshells, reduced egg production, and even egg-eating among hens. To address this, farmers often supplement their flock's diet with crushed oyster shells or limestone, ensuring adequate calcium intake for proper eggshell formation.
Protein and Energy Levels:
Layer feed typically contains lower protein levels compared to starter and grower feeds. It aims for a balance of around 12-14% protein and steady energy levels of approximately 3000 Kcal/kg. This nutritional composition supports the hen's overall health and egg-laying capabilities without promoting excessive weight gain.
Flexibility and Individual Variation:
It's important to remain flexible and observe your flock's individual needs. In some cases, younger chickens in integrated flocks may start layer feed slightly earlier, and that's okay. Additionally, monitor your flock for signs of nutritional deficiencies, such as a decline in egg production, molting, poor feather development, or weight changes. These indicators may suggest the need to transition to layer feed or make necessary adjustments. Gradually transitioning between feeds is also recommended to prevent digestive upset.
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Frequently asked questions
The starter phase is the first few weeks of a chick's life, between hatch and 3-6 weeks of age. During this phase, chicks develop their digestive tract and start to digest food. They also develop their immune function and begin to grow feathers.
Broiler chickens should be switched to grower feed at around 6 weeks of age. This feed contains slightly less protein (16-18%) to support continued growth and bone development.
Starter feed is protein-dense (20-24% protein) and designed to meet the dietary requirements of baby chicks. Grower feed has a lower protein content (16-18%) and less calcium than starter feed.
