Why?? Because it's been warm enough and we've had enough rain that those pretty little purple ground flowers are in full bloom -- not just a few here and there. The side yard is nothing but a purple carpet.
That means there's enough sugar (fructan) in the grass to make this particular horse founder in a Skinny Minute.
He won't have to wear it every single day, just yet but when I see flowers, I see founder
Just giving the warning for anyone with a Fatso and/or metabolic issues -- if you see flowers (Daffodils don't count they bloom when it's freezing), get that muzzle on during the day