An woman I know just had her main riding mule diagnosed with this; I'll have to ask her some of your questions. I know she has to be very careful about the hay she feeds out so it doesn't trigger an attack. She is still riding him, but not like she was. He was diagnosed a few months ago, so she's learning the ins and outs as well.

  Sweet SPF 75, this is a bucket of deep-fried wack with crackslaw and mashed WTF  ~ Heather the Fug Girl       
  just words...