Can horse urine turn brown after being stood?
Horses urine does turn brown after being stood for a while. If you muck out a stable and you have rubber matting then you can see the urine turns a brown will yellow streaks. However, since your horses are in a field and it’s around manure, it’s probably the moisture from the manure sitting on the top of the mud, especially if it’s been raining and the mud’s wet.
