I’ve had them done at home trot up lunge on hard/soft flexions nerve blocks ridden by usual and professional rider X-raysThis. Every horse I know who has had a lameness work up has gone to the vets. Not had the vet come out to them
I’ve mostly gone in back in the old days pre digital X-rays or if scintigraphy is needed or referral to orthopaedic specialist
It can be done