
10/07/2025
EQUINE NUTRITION 101 – Microbiome & Fibre
In our view, the ‘microbiome is EVERYTHING’ statement is not quite true.
This is because the microbiome is NOTHING unless it has enough fibre to ferment.
The importance of ensuring a healthy microbiome is rightfully emphasised, as is a ‘forage based’ diet. It would be better described as a ‘fibre-based’ diet.
The problem is the wide-spread lack of understanding of the ‘grass’ we expect our domestic horses to be calm and healthy on.
Grass IS forage but is not high enough in fibre for equines until it reaches maturity. This comes as a surprise to many horse owners.
Many of our domestic horses are not getting enough fibre on a daily basis.
Microbial fermentation of fibre in the hindgut produces by-products. They include Volatile Fatty Acids (VFAs), B-vitamins, & vitamin K.
Calling them ‘by-products’ makes them sound inconsequential but the opposite is true. These by-products are EVERYTHING to the horse.
To put it in simple terms a lack of fibre leads to lack of fermentation and reduced production of 'by-products' which disrupts the Kreb’s Cycle and energy production within cells.
Then the various cells/tissues/organs cannot properly perform their functions.
This is one of the major causes of the vast array of metabolic, neurological, muscular, respiratory, circulatory and reproductive disorders including a pathway to Insulin Dysregulation, EMS & laminitis. Exactly how each horse is affected will vary with the individual.
The vast majority of issues we are presented with daily at CHH are down to people relying on their pasture to meet fibre requirements.
Issues can brew along sub-clinically (under the surface) for quite some time before becoming an observable issue.
Steps to take to ensure your horse’s microbiome is getting enough fibre...
• Implement a longer rotation of grass growth so the grass is more mature and stalky before allowing grazing access
• Try not to overstock or let the grass be chewed down to nothing as it takes much longer to recover.
• Stock up on hay in the ‘hay season’ for the following year
• Budget for more hay
• Feed hay adlib any time your grass is short and green
• If your grass is lush and you can't take them off it, you may need to section them off into a smaller area so they can graze it right down (not ideal) and then make sure they have access to adlib hay
• Add plenty of non-lucerne chaff to feeds
• Include high fibre items such as beet or hulls (eg lupins) in daily feeds
The more FIBRE you feed, the less likely your horse will develop issues, and therefore the less supplements you'll need to fix them!
For help with what to feed your horse contact us via our Enquiry Form. Here is the Link: https://forms.wix.com/70c7cae9-bec0-444a-b26e-7da5ba4e6762:9c61e4d3-2e6b-4825-9b94-bf9c0e57e82c
Also read the Post Forage vs Fibre on May 30th
Photos – Spot the Difference!
1. Courtesy - JT Humphrey check out his website: https://john-t-humphrey.pixels.com/
2. What many of us happen to have!