Don't know why frosty frass causes problems, but it does sometimes. As for pale gums, I have always thought that to be a sign of anaemia (often seen with low grade chronic infection)
I agree my horse had pale gums and had anaemia. We just put him on some blood liquid from our local horse & rider and he was fine. Not sure about the frosty grass
i've always thought that frosty grass causes the same problems as ice-cold drinking water, or ice-cold water added to feeds - it's the shock to the system.
pale gums = anaemia, yes. perhaps because all the red blood cells are being drawn back from the extremities to the gut? we need a vet's expertise on this one, i think!
Frosty grass retains higher levels of fructose and this increased sugar levels can cause acidosis in the gut.
Also - the gums go pale pink - I believe because the blood is being taken to support the essential organs and the gut - Also look out for blood shot or "pink" eyes - another sign of colic.
Kate x
Yes acidosis of the gut has been linked to laminitic changes occuring which is why it's best to avoid frosty grass - Grass which has been subjected to warm wet weather also experiences a higher level of fructose and is another thing to avoid with horses that colic or have laminitis.
Kate x