Hmmm... we tried the "pleasant visit with no action and lots of treats (inc sausage bits :roll: ) for a period of months with the advice of the Practice "Pet Therapist".
Didn't work.
Last actual visit inside the vets (for annual jabs) she pee'd and poo'd much to her own embarrassment

and I vowed I wouldn't do it to her again.
So what to do for the next annual jabs? Well actually it turned out we needed extended visits last September for sudden joint troubles, including acupunture.
BUT... we'd acquired a campervan, so the lovely vets were very happy to come out to the van and use it as a mobile clinic. Result? Dog slightly uneasy but quite OK to have needles in, thermometers you know where - whatever

as long as she was on familiar territory.
And we're not long back from the annual jabs + KC up the nose, and what a happy dog
Now I'm not suggesting you get a camper van, but think about it - could it be worth a home visit????