Hello again Jon
As you will probably know, to bring the dogs back into the UK, their treatment must have been administered more than 24 hours previously but less than 48 hours so to reduce the chance of mad panic timing the journey to the ferry, we always make our last stopover reasonably close to the ferry ports.
So if its any help, here are the vets we and friends have used. If you require a vet in the Loire region, most campsite managers will already have dealt with the request and thus be able to make suggestions plus, there is a French equivalent of Yellow Pages which may help.
Have a good holiday.
Olivier.
BRITANNY
Vincent Goovaerts et Jo