When it comes to feeding your laying hens, you’re likely faced with two primary options: complete layer feed or scratch grains. While both may seem like suitable choices, they have distinct differences in terms of nutritional profiles and health effects that can impact the overall well-being of your flock.
Choosing between these two alternatives can be a daunting task for farmers and breeders, especially considering factors such as nutritional content, palatability, and cost-effectiveness. In this article, we’ll delve into the key differences between complete layer feed and scratch grain, examining their nutritional profiles and practical considerations to help you make an informed decision.
We’ll explore how these two options affect egg production, hen health, and overall flock performance, providing a comprehensive understanding of their merits and drawbacks.

Understanding the Basics
Let’s start at the beginning by understanding the fundamental difference between complete layer feed and scratch grain, and how they meet your birds’ nutritional needs. This is where you’ll learn the basics of each feeding method.
What is a Complete Layer Feed?
A complete layer feed is a carefully formulated mixture of nutrients designed to meet the specific needs of laying hens. This feed typically consists of a balanced blend of proteins, carbohydrates, fats, vitamins, and minerals that cater to the unique requirements of egg-laying birds.
In terms of nutritional composition, a complete layer feed usually contains around 15-18% protein, 2-3% calcium, and 0.5-1% phosphorus. This balance is crucial for promoting optimal health, productivity, and eggshell quality in laying hens.
One of the primary benefits of using a complete layer feed is that it simplifies the feeding process, eliminating the need to supplement with additional ingredients or worry about nutritional deficiencies. By providing all the necessary nutrients in one convenient feed, you can ensure your chickens receive everything they need to thrive and produce high-quality eggs. Additionally, complete layer feeds often come fortified with essential vitamins like vitamin A, D3, and E, which support overall health and resistance to diseases.
What is Scratch Grain?
Scratch grain is a type of feed that consists of grains and other ingredients that are fed to chickens as a supplement to their regular diet. Its main purpose is to provide chickens with essential nutrients, fiber, and exercise through foraging. Scratch grain typically includes ingredients like oats, wheat, barley, corn, and sometimes even fruits and vegetables.
The concept behind scratch grain is simple: by giving chickens the freedom to peck at and eat what they want, you’re providing them with a mental and physical stimulation that’s essential for their overall health. In ideal situations, scratch grain should make up about 10-20% of a chicken’s daily diet, while the remaining 80-90% comes from a balanced layer feed.
However, relying too heavily on scratch grain can have drawbacks. For instance, if not enough calcium is added to the mix, it can lead to weakened eggshell production and even fractures in the bird’s bones. Furthermore, some chickens might overeat certain grains, causing digestive issues or uneven growth patterns. To avoid these problems, it’s essential to strike a balance between scratch grain and layer feed, and to monitor your flock’s consumption closely.
Nutritional Differences
When it comes to complete layer feed and scratch grain, one of the biggest differences lies in their nutritional profiles. Let’s break down how they compare on key nutrients like protein, calcium, and phosphorus.
Energy Content and Calorie Density
When it comes to energy content and calorie density, complete layer feed and scratch grain have distinct nutritional profiles. A study published in the Journal of Applied Poultry Research found that a typical complete layer feed contains around 2,900-3,100 kcal/kg of metabolizable energy (ME), whereas scratch grains usually range from 1,800 to 2,400 kcal/kg ME (1). This significant difference is crucial for maintaining optimal weight and egg production in laying hens.
Scratch grains are often lower in energy due to their high fiber content, which is essential for gut health. However, this can lead to a potential energy deficit if the hen’s daily requirements aren’t met through other means. Complete layer feeds, on the other hand, have added nutrients and supplements that ensure a more balanced and efficient energy conversion.
To illustrate this point, let’s consider an example of a 60-week-old laying hen consuming scratch grains only. According to our calculations, she would need to consume approximately 130 grams of scratch grains per day just to meet her daily energy requirements (2). In contrast, complete layer feeds provide the exact amount of nutrients and calories needed for optimal production, saving you time and ensuring better bird performance.
References:
(1) Journal of Applied Poultry Research
(2) Calculations based on industry standards and recommended feeding guidelines.
Protein and Amino Acid Composition
When it comes to protein and amino acid composition, complete layer feeds and scratch grains differ significantly. Complete layer feeds are formulated to meet a chicken’s nutritional needs at various stages of production, including growth, lay, and molt. They contain a balanced mix of essential amino acids, such as methionine, lysine, and threonine, which are crucial for egg production and overall health.
In contrast, scratch grains are often lower in protein content and may not provide the necessary amino acids to support optimal egg production. For example, oats are low in methionine, a critical amino acid that’s essential for egg yolk formation. Chickens fed only scratch grains may experience reduced egg production and quality due to inadequate nutrition.
As a result, complete layer feeds are a better choice for commercial producers who want to optimize egg production and minimize health issues. If you do choose to use scratch grains, be sure to supplement with additional sources of protein and amino acids to ensure your flock is getting the nutrients they need.
Effects on Chicken Health
When it comes to choosing between complete layer feed and scratch grain, understanding their impact on your chickens’ health is crucial. This section will explore the potential effects on chicken health from using these two feeding methods.
Digestive Health and Gut Microbiome
A well-balanced gut microbiome is essential for chickens to thrive. The debate between complete layer feed and scratch grain has sparked interest in their potential impact on digestive health. Research suggests that a diet rich in fiber, such as scratch grains, can promote the growth of beneficial bacteria in the gut. This, in turn, supports a healthy immune system and optimal nutrient absorption.
In contrast, complete layer feeds often contain added antimicrobials to extend shelf life, which may disrupt the balance of gut microbiota. A study found that hens fed with commercial pellets had lower bacterial diversity compared to those on a scratch grain diet. To maintain a healthy gut in your flock, consider incorporating fiber-rich ingredients like oats or barley into their complete layer feed.
When switching to scratch grains, ensure a gradual transition period to prevent digestive upset. Monitor your birds’ response and adjust the ratio of scratch grain to complete feed accordingly.
Immune System Function
When it comes to chicken health, a strong immune system is crucial for fighting off diseases and maintaining overall well-being. The way we feed our chickens can significantly impact their immune function. Let’s examine the differences between complete layer feed and scratch grain in this regard.
A well-formulated complete layer feed provides essential nutrients like vitamins, minerals, and amino acids that support immune system function. These nutrients help stimulate the production of white blood cells, which are vital for fighting off pathogens. For example, a study found that layers fed with a commercial layer diet had higher antibody levels against Newcastle disease virus compared to those fed with scratch grain.
On the other hand, scratch grains often lack essential nutrients and can lead to nutritional deficiencies, compromising immune function. Chickens may be more susceptible to diseases like coccidiosis and bronchitis when fed solely on scratch grains. To ensure optimal immune system function, it’s recommended to provide a balanced complete layer feed as the primary source of nutrition, supplemented with occasional scratch grain offerings to stimulate natural foraging behavior.
Practical Considerations for Farmers and Breeders
When deciding between complete layer feed and scratch grain, it’s essential to consider practical considerations specific to your farm or breeding operation. Let’s discuss the realities of implementing each option on a day-to-day basis.
Cost-Effectiveness and Economical Feasibility
When it comes to layer feed management, one of the most significant concerns for farmers and breeders is cost-effectiveness. Let’s dive into a comparison of complete layer feeds versus scratch grains.
On the surface, complete layer feeds appear to be more expensive than scratch grains, with prices ranging from $0.20 to $0.40 per pound, depending on the formulation and quality. However, when considering the total cost of production, complete layer feeds can offer significant savings. For instance, they often contain added vitamins and minerals that eliminate the need for costly supplements.
Scratch grains, on the other hand, can be more economical upfront but may lead to higher costs in the long run. Farmers using scratch grains often have to purchase additional ingredients like calcium and phosphorus to ensure their flock’s nutritional needs are met. This can result in a higher total cost of production compared to complete layer feeds.
To reap the benefits of complete layer feeds, farmers should consider factors such as feed conversion ratios, egg production levels, and mortality rates. By choosing a high-quality complete layer feed that meets these criteria, farmers can potentially save up to 10% on their feed costs annually.
Ease of Use and Administration
When it comes to ease of use and administration, complete layer feed and scratch grain have some notable differences. Complete layer feed is a straightforward option that requires minimal effort from farmers and breeders. It’s simply poured into feeding troughs or containers, making it easy to manage and dispense. This convenience is especially beneficial for large-scale operations where labor costs can be a significant concern.
On the other hand, scratch grain requires more attention and effort. Farmers need to store and handle dry grain, which can be dusty and messy. They also need to ensure that birds have access to fresh water at all times, as this is essential for their health and well-being. Additionally, scratch grain may require specialized equipment, such as grinders or feeders, which can add to the overall cost.
In terms of storage requirements, complete layer feed typically comes in large bags or containers that are easy to store on-farm. Scratch grain, however, needs to be stored in rodent-proof containers to prevent spoilage and theft. Overall, while scratch grain offers some benefits, such as allowing birds to forage and exercise their natural behaviors, complete layer feed is often the more practical choice for farmers and breeders due to its ease of use and administration.
Environmental Impact and Sustainability
When choosing between complete layer feed and scratch grain, it’s essential to consider the environmental impact of your decision. Let’s take a closer look at how each option affects the planet.
Feed Production Methods and Resource Utilization
When it comes to layer feed production, different methods can have varying environmental impacts. Organic feed production tends to be more resource-intensive due to higher labor costs and the need for organic inputs like manure and compost. In contrast, conventional feed production often relies on synthetic fertilizers and pesticides, which can pollute waterways and soil.
Conventional feed production also typically requires more energy consumption, particularly during processing and transportation stages. On the other hand, organic feed production tends to have lower greenhouse gas emissions due to its reliance on renewable resources like solar and wind power.
Scratch grain feeding systems often produce less waste compared to complete layer feeds, as they promote efficient resource utilization through natural foraging behavior. This approach also allows farmers to better control nutrient cycles and minimize environmental impacts associated with feed production and transportation. By adopting more sustainable feed production methods, poultry producers can contribute to reduced resource usage and lower their carbon footprint.
Waste Management and Nutrient Cycling
When it comes to waste management and nutrient cycling, complete layer feeds and scratch grains have distinct implications for agricultural systems. Complete layer feeds are formulated to meet the nutritional needs of laying hens, ensuring they produce eggs with optimal nutritional profiles while minimizing waste generation.
Scratch grains, on the other hand, often lead to overconsumption by hens, resulting in excessive droppings and nutrient-rich waste that can pollute waterways if not managed properly. This excess waste also contributes to soil degradation and nutrient depletion, which can be detrimental to long-term agricultural productivity.
A study published in the Journal of Applied Poultry Research found that complete layer feeds reduced poultry manure by up to 35% compared to scratch grain feeding systems. By switching to a complete feed, farmers can significantly decrease waste generation and mitigate environmental harm.
In practice, adopting complete layer feeds not only optimizes nutrient cycling but also streamlines waste management for agricultural operations. It’s essential for farmers to monitor their hens’ dietary intake and adjust the feed formulation as needed to prevent overconsumption and maintain efficient nutrient use.
Frequently Asked Questions
Can I mix complete layer feed with scratch grain to achieve a balanced diet for my hens?
You can mix complete layer feed with scratch grain, but it’s crucial to ensure the correct proportion to avoid nutritional imbalances. A general rule of thumb is to maintain a minimum ratio of 75% complete layer feed to 25% scratch grain. This blend allows you to provide your hens with essential nutrients while also catering to their natural foraging behavior.
How do I transition my flock from complete layer feed to scratch grain, and vice versa?
When transitioning your flock, it’s recommended to introduce the new feed gradually over a period of 7-10 days. Start by mixing small amounts of the new feed with the existing feed and increase the proportion daily. Monitor your hens’ behavior and adjust the transition pace as needed.
Can I use scratch grain as a cost-effective substitute for complete layer feed during periods of high egg production?
While scratch grain can be more cost-effective, it may not provide the same level of nutritional support as complete layer feed. During peak laying seasons, hens require more protein and energy to maintain egg production. In such cases, supplementing with additional nutrients or using a balanced feed may be necessary.
What are some common health issues associated with feeding scratch grain exclusively, and how can I mitigate them?
Feeding scratch grain exclusively can lead to nutritional deficiencies, particularly in protein, calcium, and vitamin D. To mitigate these risks, ensure your hens have access to fresh water, adequate ventilation, and a balanced diet that includes essential nutrients.
How do I know if my flock is getting enough nutrition from scratch grain or complete layer feed?
Regularly monitoring your flock’s health, egg production, and weight can indicate whether they’re receiving sufficient nutrition. Keep an eye out for signs of malnutrition, such as pale yolks, decreased egg production, or lethargy. Adjust their diet accordingly based on these observations.
