That's what you do, that's not what I do. My vet is great but generally doesn't deal in muscle soreness etc, I am sure if I called her she would say to get the chiro. The other vets in this town would charge me a ton of money to come out - it cost a friend $200 to get an abcess lanced the other day.
My chiro and bodyworker will look over my horse and tell me straight up if there is nothing they can do and they won't charge me. I'd much rather take that option.
I also schedule chiro/bodyworkers when there may not be an obvious issue just to check up and see if there is anything going on I may have missed. Would you call your vet if you didn't think anything was wrong?
Different strokes for different folks, and I was simply stating that it seems very bizarre to me to have to call a vet before getting a chiro to my horse.