So, where do animals souls go after they leave the body?
nephesh
neh'-fesh
From
H5314 ; properly a breathing creature, that is, animal or(abstractly) vitality; used very widely in a literal, accommodated orfigurative sense (bodily or mental):—any, appetite, beast, body,breath, creature, X dead (-ly), desire, X [dis-] contented, X fish,ghost, + greedy, he, heart (-y), (hath, X jeopardy of) life (X injeopardy), lust, man, me, mind, mortality, one, own, person,pleasure, (her-, him-, my-, thy-) self, them (your) -selves, + slay,soul, + tablet, they, thing, (X she) will, X would have it.
Animals don't have souls. Souls are what differentiates animals from humans.