Most flukicides are not to be used in goats producing milk for human consumption, as they have an almost forever withdrawal period. This is not just for goats, same for sheep and cows. Did they actualy have fluke or was it done as a routine?
I would however get a FEC test done at kidding time to make sure they do not need worming, as there is often a rise in worm egg shedding at kidding time due ti a depressed immune system. Goats need watching for worms more carefully than sheep, as even adults do not build up much of a tolerance of worm population in the way that sheep do.
And yes, Lambivac rather than Heptavac. If your vet needs more info re treating goats the Goat Vet Society can be contacted.
And yes, also just have seen this, so no idea what happened with forum over last week or so...