As temperatures decline and pasture grasses enter dormancy, cattle producers are being encouraged to reassess their herds’ nutritional requirements to maintain animal health and productivity throughout winter. Kansas State University cow-calf specialist Jason Warner has highlighted the importance of protein supplementation, particularly for spring-calving cows grazing low-quality forage during the colder months.
Seasonal changes in pasture quality can significantly affect livestock nutrition, as dormant grasses contain lower protein levels and may not provide sufficient nutrients to support normal digestion and body condition. Appropriate supplementation can help producers maintain forage intake, meet nutritional requirements and manage feeding costs.
Declining Forage Quality Increases Protein Requirements
During autumn and winter, native grasses gradually lose nutritional value as they become dormant. The declining protein content can limit the ability of cattle to digest available forage efficiently, reducing the energy they obtain from grazing.
According to Warner, protein is frequently the most limiting nutrient in low-quality forage systems. Supplementing protein can improve forage digestion and intake, helping cattle maintain body condition even when pasture quality deteriorates.
Nutritional requirements also change according to the animal’s stage of production. Spring-calving cows generally have relatively low protein requirements during early autumn, but their nutritional needs gradually increase as they approach calving.
Warner emphasised that producers should assess nutritional requirements across the entire feeding period rather than focusing on individual feeding days. Maintaining adequate protein intake is particularly important for supporting forage digestion and ensuring sufficient energy availability during late gestation.
Choosing Suitable Protein Supplementation Methods
Cattle producers have several options for delivering supplemental protein, depending on their farm infrastructure, pasture locations and ability to access animals regularly.
Self-fed supplements, including lick tubs, protein blocks and trough-based products, can be useful for operations where daily feeding is difficult. These products allow cattle to access additional nutrients without requiring producers to visit pastures frequently.
Alternatively, producers with cattle located closer to feeding facilities can distribute supplements using pickup-mounted cake feeders, feed mixers or manual feeding systems.
Warner noted that the delivery method can vary considerably, but the primary objective should remain the same: providing the required amount of protein to support the nutritional needs of the herd.
Selecting an appropriate feeding system can also help reduce labour requirements and improve the practical management of winter supplementation programmes.
Evaluating Forage Quality and Nutritional Requirements
Understanding the nutritional composition of available forage is an important first step in determining supplementation requirements.
Producers should evaluate forage quality alongside cattle body condition, stage of pregnancy and expected nutritional demand. This allows them to determine whether existing grazing resources provide sufficient protein or whether additional supplementation is necessary.
According to Warner, supplying approximately half a pound to one pound of supplemental protein per cow daily, in addition to grazing, is generally adequate for late-gestation cows.
Total dietary protein requirements for cows approaching calving may range from approximately 1.6 to 2.5 pounds per head daily, depending on forage quality and production stage.
Warner also highlighted that protein supplementation can improve forage intake considerably when cattle are grazing low-quality pastures. Maintaining adequate nutrition during this period can help prevent excessive body-condition loss and support animal performance around calving.
Comparing Feed Costs Through Protein Value
Although favourable cattle prices have supported producer returns, managing winter feeding expenses remains essential for maintaining profitability.
Warner advised producers to compare supplements based on their cost per unit of protein rather than relying solely on the purchase price per tonne. This approach provides a more accurate assessment of the economic value of different feed ingredients.
For example, dry distillers grains priced at $225 per ton with 30% crude protein have an equivalent cost of approximately $750 per ton on a 100% crude protein basis. Meanwhile, wheat middlings priced at $250 per ton with 17% crude protein have an equivalent cost of approximately $1,471 per ton.
| Feed supplement | Price per ton | Crude protein | Cost per ton of crude protein |
|---|---|---|---|
| Dry distillers grains | $225 | 30% | $750 |
| Wheat middlings | $250 | 17% | $1,471 |
This comparison demonstrates how feed ingredients with similar purchase prices can offer substantially different nutritional value for the money spent.
Supporting Livestock Productivity Through Winter
Effective winter nutrition management is essential for maintaining cattle health, reproductive performance and farm profitability. Declining forage quality makes protein supplementation particularly important for spring-calving herds, where nutritional requirements increase as calving approaches.
Producers are encouraged to evaluate available forage, assess individual herd requirements and select cost-effective supplementation strategies.
By combining appropriate protein sources with effective feeding systems, cattle operations can make better use of available pasture resources, maintain body condition and prepare herds for the next production cycle.
