You've never met a demon at all (or at least not one you've recognized). Otherwise, you'd know that demons, being insubstantial, do not eat at all. Therefore, ANY jerky would (in a real-life setting) be useless to attract them.
My point? Demon eating habits are moot, since demons don't eat. If Zale decides they eat anything AT ALL, it will be fiction. So, leave the decision up to him.
(BTW: Not sure if plants grow in Hell, but if they do, I'm pretty sure there'd be
some demon down there big and bad enough to take their leafy butts on, no matter how powerful they are)
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)