I thought they were slaughtering animals without benefit because they lacked the labor to slaughter them for retail sale. Iff that's the case, panic buying helps them not at all and maybe makes the PR side of things even worse.
Panic buying also fails to help them if they basically can't raise prices to take advantage of it. It's not like panic buying is going to line their pockets, and certainly nowhere near enough to compensate for the damages they seem to be suffering.