Unfortunate anytime but really bad timing for the owners when prices are so high.
Check it out:

Several thousand head of cattle have been quarantined in Montana after a cow near Yellowstone National Park tested positive for brucellosis, the livestock disease much feared by ranchers and also carried by elk and bison, state livestock officials said on Friday.

The disruption comes at a crucial moment for the region’s beef producers, who are in the midst of readying the bulk of their herds for sale at a time of record high prices for the cattle they bring to auction.