Anyone dealth with this? treatment? Prevention? Cows look good until calving then they go off feed, run high temps, looks like Johnes but isnt. My neighbor is dealing with this, and has spent a TON of money to diagnos the problem with no help in site. Finally got a diagnosis, but in 3 years time he has lost 40 animals and he only milks 30 -40 cows! With the price of milk the way it is, he needs all he can get and at this rate he won't have a herd left.