I hope the antibiotics work and they are both feeling better soon.
Fingers crossed that the others haven't caught the bug - keep us posted.
BTW, I always get a bottle of antibiotics from the vets just before lambing - sometimes I need it for 1 or more ewes/lambs sometimes I don't use it at all. It's just piece of mind that I can act quickly and some years probably saves me ££ on trips to the vet if it resolves the problem.