How many bacteria are in a horse’s digestive tract?

How many bacteria are in a horse’s digestive tract?

A horse is able to host up to 10¹⁵ bacterial cells within their digestive tract! The majority of these bacteria reside in the colon, particularly the caecum.

These bacteria play essential functions in our horses and ponies: they help to digest fibre through fermentation, providing our horses and ponies with a valuable energy source.

Through this fermentation of fibre, these bacteria also produce substances which have immune-supporting and anti-inflammatory properties. Importantly, some of these substances help to strengthen gut wall integrity and help prevent against the development of gastric and colonic ulcers. Additionally, these bacteria produce B group vitamins (including biotin) and vitamin K.

Fibre is a key component of our horses’ and ponies’ diets for their overall health, wellbeing and performance. Ensuring they are fed sufficient fibre is a dietary factor which is often overlooked, yet is arguably one of the most important feed related factors which influences every facet of their health.

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