This is when I tend to make mistakes.
I started new feeding system which involves growing her fresh food, built her her own pen, scraped and water the ground she was walking on. I racked my brain and cried my eyes out.
I promptly called the vet.
To my delight Benadryl is just fine for use on horses. He read me the does over the phone, I went to my supply which thankfully was just replenished, and headed outside with a syringe full of milky pink liquid.
Cyndi Bird CEST