I'd hoped they'd go after baby RCS, nope. Ken's spirulina sticks and Mysis are good, brine etc here and there if they are decent size(1"+).
Cut bamboo make good hiding spots for them/most smaller plecos.
Shimp are almost never bothered IMO with perhaps 20-30 species in this group.
If they do eat them, it'd be shear luck and rare, but Zebras not even close.