As autumn winds down, it’s time to turn your attention to winter feed for livestock. A well?thought?out plan now can safeguard body condition, immunity and productivity when grazing becomes limited.

Kathryn Thompson :: Monday 13th October 2025 :: Latest Blog Posts

Winter Feed Planning: Keep Your Livestock Healthy and Productive

As autumn winds down, it's time to turn your attention to winter feed for livestock. A well?thought?out plan now can safeguard body condition, immunity and productivity when grazing becomes limited. In this post we walk sheep and cattle farmers through preparing rations for the colder months-balancing energy, protein, fibre and minerals-so your stock transition smoothly, perform well and costs are kept in check.

Why Winter Feed Planning Matters

Winter imposes extra demands on livestock. With colder weather, animals burn more energy just to maintain body temperature. Meanwhile, pasture quality and quantity decline sharply, and grazing opportunities diminish. Without careful planning, cattle and sheep can lose condition, suffer poorer immunity, or produce less (milk, growth, reproduction).

For example, intake for cows may have to increase by 20?% in colder months just to maintain body reserves. A sound feeding plan helps avoid surprises, spreads risk, and allows you to budget and source feed ahead - fewer last?minute purchases at premium prices.

Understanding Nutritional Needs in Winter

Energy & Maintenance

In winter, the energy (metabolisable energy, ME) requirement for maintenance is higher. For dry or non?lactating cattle, a baseline of ~9?MJ ME/kg dry matter is typically considered a maintenance threshold. If the weather is harsh, or your animals are wet or exposed, they will require an energy "buffer" beyond maintenance.

Protein, Fibre, Minerals & Vitamins

Protein needs remain important. A low crude protein (CP) diet will limit intake and performance. In beef cattle, CP of 9?% or more is often a minimum for maintenance, while younger or growing stock may need 11–13?% CP. Fibre must be adequate to maintain rumen function. Minerals (e.g. calcium, phosphorus, magnesium, trace elements) and vitamins are critical, especially when forages' mineral content falls in winter.

Differences by Class

• Growing / finishing stock: they often need higher nutrient density (energy and protein) than maintenance animals to continue gain.
  
  
• In?lamb ewes / pregnant cattle: additional needs in late gestation must be planned for. For example, in?calf beef heifers may have CP needs of ~11?% through much of gestation, rising nearer to calving.
  
  
• Lactating cows / nursing ewes: these are often the highest demand group and will almost certainly need supplementation beyond winter forages.

Choosing the Right Winter Feeds for Cattle & Sheep

Forages: Silage, Hay, Haylage, Straw

• Silage / haylage is often the backbone of winter rations. If well?made and well preserved, it delivers both energy and fibre.
  
  
• Hay is more stable than silage but often lower in energy. It's a good "base" but may need supplementation.
  
  
• Straw has very low energy and protein; it's often used as a filler (bulk) or for rumen "scratch," but should be balanced carefully.
  
  
• Haylage / round bale silage can offer intermediate options-depending on dry matter content.

Because silage/hay quality is so variable (depending on cut timing, wilting, fermentation), you can't rely on visual appearance. Always send samples for analysis (DM, ME, CP, fibre) before rationing.

Concentrates, Blends & Mineral Supplements

When forages fall short (in energy, protein or minerals), strategic supplementation is needed.

• Concentrates / compound feeds provide energy (cereals, starch) or protein (soya, rapeseed, etc.). They help "top up" the ration without overfeeding bulky forage.
  
  
• Custom blends allow you to tailor ingredients (energy, protein, trace elements) to exactly match stock needs and forage deficits.
  
  
• Mineral/vitamin supplements are essential, especially when forages are deficient-e.g. low magnesium or selenium in poor silages.
  
  
• By?product feeds (e.g. brewers' grains, pulp, DDGS) may be cost effective, if logistically accessible, but need consistent quality and integration into whole?diet plans.

How to Plan Rations for Maximum Efficiency

Step 1: Analyse Your Forage

Begin by sampling all forages (silage, hay, etc.). Request nutrient analysis: DM, ME, CP, fibre fractions, ash and mineral content. This gives a foundation to see which nutrient gaps you must fill.

Step 2: Estimate Demand

Calculate how much feed (dry matter) and which nutrients your animals require:

• Daily dry matter intake (DMI) often falls in the 2–3?% of body weight range (adjusted for class and energy density).
  
  
• Multiply daily needs by the number of days in the winter period and number of animals to get total demand.
  
  
• Consider maintenance, growth, gestation, milk - whichever applies to your class.

Step 3: Compare Supply and Demand

Subtract the nutrients supplied by your forages from your required figures. This gives you deficits in energy, protein or minerals.

Step 4: Plug the Gaps with Supplements

Using your blend or compound feeds, fill the deficits. The aim is to reach a balanced ration that delivers required energy, protein, fibre and minerals at least cost. Watch that you don't overdo supplements - overfeeding can be wasteful and may cause digestive disorders.

Step 5: Monitor & Adjust

Once feeding starts, monitor body condition, performance, dung consistency, and weight changes. Adjust rations mid?winter if necessary.
Keep records so you can refine for next year.

Transitioning from Grazing to Winter Feed

Switching too abruptly can stress the rumen and upset health. Follow these best practices:

• Introduce new feeds gradually over 7–10 days (or more for sensitive stock).
  
  
• Blend grazed grass with conserved forage initially so rumen microbes adapt.
  
  
• Avoid sudden high levels of concentrates; build up slowly to prevent acidosis.
  
  
• Ensure clean water and feed space - competition or shortages amplify stress.
  
  

A gradual changeover helps maintain intake and avoid weight loss.

Managing Costs Without Compromising Quality

Smart Buying & Forward Planning

• Order ahead - securing volume early often gets better pricing and avoids spot shortages.
  
  
• Bulk purchases or long?term contracts can reduce per?unit costs.
  
  
• Consider custom blending so you use only what you need (rather than off?the?shelf, overly generous formulas).
  
  

Precision Feeding & Minimising Waste

• Feed to meet but not exceed requirements - overfeeding energy or protein is wasted.
  
  
• Use feeders / troughs that reduce trampling, fouling and wastage.
  
  
• Fractionate feeding (smaller, more frequent meals) can improve utilisation.
  
  
• Weighing, record keeping and benchmarking help you spot inefficiencies or overspend.

What Next?

Winter feed planning is not optional - it's essential. By analysing your forages, calculating demand, filling gaps wisely and transitioning carefully, you safeguard stock health, performance and your bottom line. 

Start the process now: audit your feed stocks, book your forage analyses, and talk to BW Feeds about tailored winter rations and formula support. BW Feeds can offer tailored blends, consultations and ingredient sourcing to help you hit nutrient targets at minimum cost. Custom formulations based on your forage analysis and stock classes can deliver more efficient performance with lower waste. A little planning today will pay dividends throughout the cold season.