rumen shut down

Poor Minnie the LaMancha. She's usually our herd queen and is full of mischief. But she's not feeling well today. At chore time (7:30-ish) she wouldn't touch her grain and only lipped her hay. Temp was 100.8. No rumen sounds. She's not visibly bloated, but her left side is hard as a rock...

So, Lola has been "off" since we got back Monday night from a 4 day fair. Appetite has been iffy; worse in the mornings, so-so in the evenings. Temp this morn is 99.9 F. Milk production is down to almost nothing. She's had a rumen bolus (yeast) Tues, Wed, Thurs and today. We put a sweat...