Sounds like your goats have the early stages of Phneumonia. I just lost a kid to that a few days ago. Call your vet and ask them. If it's phneumonia and you don't stop it in time, no amount of medication will save them. Anelgesic, a subcutaneous injection, may help with their eating, but if it doesn't, you really should call a vet. Sequester the sick ones immediately, though. You don't want them infection the rest of the herd.
Good luck to you.