the recorce pack changes the textures of mobs like the zombie, husk, pig, cow, sheep, creeper, mooshroom, vex, ally, piglin, piglin brute, zombie piglin, ravager, iron golem, squid, glow squid, magma cube and turtle
(the file is called better vanilla mobs, apparently the word vanilla can't be in the name of the mod or the name of the file)