6 EFFECTIVE WAYS TO PREVENT BONE DEGENERATION IN LAYING HENS
Bone degeneration in laying hens is one of the most common problems in modern poultry farming, especially in flocks with high egg production or extended laying cycles. This condition not only affects the birds’ mobility but also directly impacts egg production, eggshell quality, and the overall economic efficiency of poultry operations.
In practice, many laying hens show signs such as difficulty walking, weak legs, frequent falls, or spending more time sitting and lying down than standing. These are typical symptoms of “layer fatigue,” a condition caused by damage to the leg bone structure due to mineral deficiencies, particularly calcium.
In laying hens, more than 90% of the body’s calcium is stored in the bones. Bones also serve as the primary calcium reserve for eggshell formation when dietary calcium intake is insufficient. If this deficiency continues over time, calcium stored in the bones is constantly mobilized, causing the bones to become weak, brittle, and more susceptible to deformation.
To reduce the risk of bone degeneration and help laying hens maintain stable health throughout the laying period, poultry farmers should pay close attention to the following measures.
1. Provide Adequate Calcium During the Growth Stage
Supplying sufficient calcium to pullets is essential for developing a strong skeletal system before they enter the laying phase. In particular, the period between 16 and 18 weeks of age is considered critical because the hens’ bodies begin preparing for egg production during this stage.
Limestone is currently the most common calcium source because it is affordable and easy to incorporate into feed formulas. However, calcium supplementation must be provided at the right time and in the correct amounts. Feeding excessive calcium too early may negatively affect the birds’ ability to absorb minerals later in life.
Therefore, farmers should formulate balanced diets that support bone development without causing unnecessary mineral excess.
2. Adjust Calcium Levels Throughout the Hen’s Life Cycle
The calcium requirements of laying hens are not constant but vary depending on age and egg production levels. As egg production increases, calcium demand also rises to support eggshell formation.
In reality, the calcium content in limestone can vary significantly, ranging from 22% to 38% depending on the source material. For this reason, poultry farmers should choose stable limestone sources with analyzable nutritional compositions to ensure feed quality.
Pure calcium carbonate is considered one of the best calcium sources due to its high bioavailability and low impurity levels. In addition, purchasing enough limestone for the entire laying cycle can help minimize variations in raw material quality between production batches.
3. Balance Essential Minerals for Bone Health
In addition to calcium, several other minerals play important roles in maintaining skeletal health and egg production performance in laying hens.
Phosphorus helps support bone formation and maintenance. Magnesium is involved in mineral metabolism, while sodium and chlorine contribute to electrolyte balance and normal physiological functions.
Trace minerals such as manganese are also essential for bone development and eggshell quality. If the dietary balance among these minerals is disrupted, calcium absorption may decline significantly, increasing the risk of bone degeneration and reduced productivity.
For this reason, providing a complete and balanced mineral profile is a key factor in modern layer nutrition programs.
4. Supplement Vitamin D to Improve Calcium Absorption
Vitamin D plays a vital role in helping the body absorb and utilize calcium effectively. Without sufficient vitamin D, hens may struggle to absorb calcium even when their diets contain adequate levels.
Today, many vitamin D products are available on the market with varying quality and effectiveness. Poultry producers should therefore select reliable products with clear origins and use them according to the manufacturer’s recommendations.
Proper vitamin D supplementation not only strengthens bones but also improves eggshell quality and reduces the incidence of thin or cracked shells during collection and transportation.
5. Properly Combine Fine and Coarse Limestone
One nutritional strategy widely used in layer production is the combination of fine and coarse limestone particles in feed.
Fine limestone is absorbed quickly, while coarse limestone remains longer in the digestive tract, providing a more sustained calcium release during eggshell formation, especially at night when hens are not eating.
However, the ideal ratio of fine to coarse limestone may differ depending on the breed. White-egg and brown-egg laying hens often have different mineral utilization characteristics. Therefore, farmers should follow breed supplier recommendations to determine the most suitable limestone particle size ratio for their flocks.
6. Use Organic Acids to Maintain Calcium Absorption in Older Hens
In laying flocks with long production cycles or very high egg output, calcium absorption efficiency tends to decline with age. As a result, the risk of bone degeneration becomes greater during the later stages of the laying cycle.
Supplementing organic acids at the correct time and dosage can help improve gut health, enhance mineral absorption, and maintain skeletal strength in older hens.
This approach is considered particularly beneficial in modern poultry systems, especially as newer layer strains are now being developed to produce up to 500 eggs during their lifetime.
Bone degeneration in laying hens is a major issue affecting flock health, eggshell quality, and the profitability of poultry farming operations. The main causes are calcium deficiency and nutritional imbalance in the diet.
To effectively prevent this condition, poultry farmers should focus on providing adequate calcium, vitamin D, and essential minerals while implementing feeding programs tailored to each stage of the hens’ development.
When laying hens maintain strong skeletal health, their mobility, egg production performance, and eggshell quality can remain stable, contributing to more sustainable and profitable poultry production.
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