Low nitrate hay, Santa Rosa?


I am a new member still working on my new member profile to upload for my horse. I have a 26 year old gelding who has nitrate induced laminitis. Any suggestions for a low carb/low nitrate hay source? The ones I know of who sometimes have hay tests and sometimes I need to test myself are:

Frizelle Enos
Larsen's Feed
Scarpete Hay
Dave's Hay Barn
Western Farm Center
Rivertown Hay and Feed
North Bay Hay and Grain
Marija Vulfs, N. California, 2020

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