Let us then discuss the "souls" resident within all creatures with identifiable (or describable) brains that can also "walk".
Shall we now peruse the "soul" of a salamander, or the "spirit" of an arachnid? Are these brains imbued with some knowledge/understanding of "God", and if so, should they not be seeking salvation too?
Does god give life to non-human brains? Does god grant "souls" to non-human brains? What does Scripture say about any alleged discriminations/dispensations of "souls" in this regard?
Hold on I've got the perfect scripture.
All things were created spiritually, using more refined matter than that which makes up our temporal bodies, before they were created physically.
All things seem to have life, which God gives them, even rocks.
This is Jesus Christ (God the Son; the God of the Old and New Testament and of this world) speaking in these revelations, given by inspiration, to Joseph Smith.
Doctrine and Covenants 128: 23 (LDS Scripture)
Let the mountains shout for joy, and all ye valleys cry aloud; and all ye seas and dry lands tell the wonders of your Eternal King! And ye rivers, and brooks, and rills, flow down with gladness. Let the woods and all the trees of the field praise the Lord;
and ye solid rocks weep for joy! And let the sun, moon, and the stars sing together, and let all the sons of God shout for joy! And let the eternal creations declare his name forever and ever! And again I say, how glorious is the voice we hear from heaven, proclaiming in our ears, glory, and salvation, and honor, and immortality, and eternal life; kingdoms, principalities, and powers!
Christ also spoke of this, while on earth, suggesting rocks had a life of their own.
Luke 19: 40
And he answered and said unto them, I tell you that, if these should hold their peace,
the stones would immediately cry out.