KAthy Watts at safergrass.org is a wealth of knowledge about forages for horses. Here is her emergency flyer for laminitis.

https://static1.squarespace.com/static/5e7fddf934de306c2b8cc313/t/5e85f59abcb4d36843f7b01c/1585837466677/Your+Horse+has+Laminitis.pdf