Building muscle in horses with Baileys Horse Feeds

Feb 23
Expert Advice from Baileys Horse Feeds, Official Feed Partner to British Eventing 
 Building muscle and topline in horses doesn’t need to be complicated. With the right training and a correctly balanced diet, supporting healthy muscle development is straightforward and cost-effective.

A horse in good condition has optimum levels of body fat and is well-muscled for his level of work and fitness. Where that muscle develops depends on his training and workload. However, if the diet is lacking the correct nutritional building blocks, the horse’s body will never fully achieve the desired musculature.

Below, Baileys Horse Feeds explains the key nutritional principles behind building muscle in performance horses.  

Protein for Muscle Development – Quantity Matters
First and foremost, the diet must supply sufficient protein, the main component of muscle and body tissue. Protein is supplied in only limited amounts by forage (grass, hay and haylage). 
As workload increases, so does the horse’s requirement for protein — both to build new muscle tissue and to repair muscle fibres that are constantly stressed during work and performance.
If dietary protein intake is inadequate, muscle development and recovery will be compromised.  

Protein Quality – The Essential Amino Acids Protein quality is just as important as protein quantity. Protein is made up of individual amino acid “building blocks.”

While the horse can manufacture many amino acids internally, there are a small number of essential amino acids, including methionine and lysine, which must be supplied in the diet.

Pasture, hay and haylage may not provide sufficient levels to meet the needs of a working horse. For this reason, feed manufacturers use quality protein sources such as:
  • Alfalfa
  • Micronised soya
  • Distillers’ grains (a co-product of the brewing industry)

When selecting a feed to support muscle building and topline development, it is important to look for these ingredients on the label.  


Vitamins and Minerals for Muscle Function

Muscle development is not just about protein. Other nutrients are essential for healthy muscle structure and function.
  • Vitamin E and selenium are important antioxidants that help neutralise free radicals produced in greater quantities as workload increases.
  • Calcium and magnesium are involved in nerve impulse transmission and are essential for correct and sustained muscle contraction.


Without appropriate levels of these nutrients, muscle performance and recovery may be compromised.  

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The Importance of a Fully Balanced Diet

Ensuring your horse’s diet contains the necessary nutrients for muscle building and function does not need to be complicated or expensive.

While it is possible to add a “body-building” supplement to an existing diet, a more holistic and cost-effective approach is to review and optimise the base diet first.

Check that your chosen feed and/or balancer is formulated for your horse’s workload, and that it is being fed at the manufacturer’s recommended levels.

Cubes and mixes are designed to be fed in sufficient quantities to provide a fully balanced diet alongside forage. Underfeeding — often done to avoid extra calories — reduces intake of protein, vitamins and minerals as well, meaning overall nutrient levels are likely to be inadequate.  

Using a Performance Balancer to Support Muscle
A balancer, such as Baileys Performance Balancer, can be particularly useful when building muscle.
It can be:
Added to reduced amounts of a mix or cube to provide additional protein and nutrients
Fed as the sole concentrate alongside forage for good-doers
Used to help build and maintain muscle while calorie intake is controlled

This approach allows you to support muscle development without unnecessary weight gain.  

Expert Advice on Building Muscle and Condition

If you would like tailored advice on building muscle or improving condition in your horse, contact the Baileys Nutrition Team on:

📞 01371 850247 (option 2) 📧 nutrition@baileyshorsefeeds.co.uk  

Building Muscle Source: Baileys Horse Feeds – Building Muscle
✅ Ensure diet provides sufficient protein for muscle repair and growth
✅ Check protein quality – essential amino acids (methionine, lysine) must be supplied
✅ Look for quality protein sources in feed: alfalfa, micronised soya, distillers’ grains
✅ Provide adequate vitamins and minerals, including Vitamin E, selenium, calcium, magnesium
✅ Feed a fully balanced diet – mix, cube or balancer alongside forage
✅ Avoid underfeeding – insufficient calories reduce all nutrient intake
✅ Use a Performance Balancer if: ·       
  • You feed reduced amounts of mix/cube ·       
  • You need to feed a good-doer without adding excess calories

✅ Combine correct diet with appropriate training/exercise to build muscle in the right areas
✅ Monitor condition and topline development regularly

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