Why would you take a dog to the vet for worms ?? Just treat the thing.
And you can keep your worming , jabs , frontline etc as well.
These are all done at home , without the need for a vet.
This has to be a leg pulling exercise - I find it very difficult to believe that somebody who keeps dogs and shoots regularly and has for quite a few years does not know what worms are or has not encountered them at some point in their life.....