Given that she is not milking/in-kid not eating concentrates for a few days is not the end of the world, can you get readigrass (from the horsey section)? Mine absolutely love it, or try Alpha-A (the plain version, yellow bag), again loved by my milkers at the moment. Both of them a good fibre as well as energy/protein for goats.
Goats can also get viral infections, just like humans...
If she has got a high cocci count it may be worth giving her a dose of Vecoxan or Baycox (same as sheep, but needs fairly accurate weighing of the animal). Usually adults have quite a high level of cocci, but only a small percentage of them is causing illness, the rest is just there... The oldest mine have been when given vecoxan was 7 months, and then it was in conjunction with wormer to clear up diarrhoea.