It will be no surprise to Thoroughbred breeders when we say that weaning is likely the most stressful event that will occur in a horse's life. During stressful events like weaning, the gut microbiome changes and this may have negative consequences on health. Providing support to the gut may minimise the longer-term impacts of weaning on your foals' development.
Research from Kentucky suggests that the bacteria colonisation of the foal’s gut occurs in its first 2 weeks of life. By weeks 4 - 6 the foal’s microbiota does not change significantly week to week. So, the first two weeks are crucial in terms of it setting the foal up with ‘good’ bacteria for a healthy gut for life.