If your hens are healthy and happy, a trip to the vets will be a total waste of time and money. If they haven't already been vaccinated, in any case it I'll be too late to do them now, as a full vaccination programme begins when they're little chicks and carries on at intervals until they're point of lay around 16 weeks. If they're the only hens you have, they're not at risk of catching anything from any others,are they! And the vet couldn't do it for you, anyway, as the vaccines are sold in large batches for treating lots of hens at once, and they don't keep when the pack has been opened. Also, if they have already been vaccinated to so it again would be harmful. Ask the breeder what vaccinations they have had, if any.
What they do need, however, at this stage is a course of Flubenvet wormer to clean up their gut before they come into lay. Then do them again every 4-6 months after that, so Jan-Feb. to prepare them for the new Spring. You can buy a tub of Flubenvet on the Internet, then you add it to their normal pellets and feed only thatfor seven days. Each bird will then eat the right amount for her weight. Do not rely on herbal tonics, they won't kill the worms or their eggs.
More info on worms on Piultrykeeper, here,http://poultrykeeper.com/general-chickens/worming-chickens
