Why does the poo change in spring?
The grass gets greener. The manure gets greener. And sometimes considerably less pick-up-able.
If you've mucked out a spring paddock and wondered whether something has gone wrong with your horse, you're not alone, and you're not necessarily right. Loose, softer manure is one of the most common and most over-interpreted changes owners see this time of year.
It's mostly water, and that's mostly normal
Lush spring pasture carries significantly more moisture than the drier forage horses are eating over winter. More water going in the front end tends to mean more water coming out the back end. On top of that, the shift in what's actually being fermented in the hindgut - different sugars, different fibre ratios - can change stool consistency without anything being "wrong" with the gut itself. A change in manure texture, on its own, is information. It isn't automatically a diagnosis.
But here's where it stops being "just spring grass"
That said, we're not going to tell you to ignore everything and carry on. Persistent diarrhoea, weight loss, fever, any sign of colic, or a horse that's simply not himself, that's not a spring-grass shrug, that's a vet conversation. The difference between "the manure looks different" and "the horse is unwell" matters, and it's worth knowing which one you're looking at before you decide it's nothing.
Supporting the gut isn't the same as stopping it
It's also worth separating two very different goals. Trying to firm up manure for its own sake and supporting the underlying digestive environment through a period of dietary change are not the same project, and chasing the first one isn't always in service of the second. The more useful question isn't "how do I stop this," it's "what does my horse's gut need to handle this transition well."
Takeaway: Looser manure in spring is common and usually explainable. An unwell horse is never something to explain away.
