they dont 'have' souls...they 'are' souls.
ne′phesh and psy‧khe′ are applied to both mankind and animal kind in the scriptures and the meaning of soul is the physical body...not some spiritual part inside the body.
The belief that the soul continues its existence after the dissolution of the body is a matter of philosophical or theological speculation rather than of simple faith, and is accordingly nowhere expressly taught in Holy Scripture.The Jewish Encyclopedia (1910), Vol. VI, p. 564.
There is no dichotomy [division] of body and soul in the O[ld] T[estament]. The Israelite saw things concretely, in their totality, and thus he considered men as persons and not as composites. The term nepe [ne′phesh], though translated by our word soul, never means soul as distinct from the body or the individual person. . . . The term [psy‧khe′] is the N[ew] T[estament] word corresponding with nepe. It can mean the principle of life, life itself, or the living being.New Catholic Encyclopedia (1967), Vol. XIII, pp. 449, 450.
Gen 1:20 And God went on to say: Let the waters swarm forth a swarm of living souls ...24 And God went on to say: Let the earth put forth living souls according to their kinds, domestic animal and moving animal and wild beast of the earth according to its kind.
30 And to every wild beast of the earth and to every flying creature of the heavens and to everything moving upon the earth in which there is life as a soul
Lev. 24:17, 18: In case a man strikes any soul [Hebrew, ne′phesh] of mankind fatally, he should be put to death without fail. And the fatal striker of the soul [Hebrew, ne′phesh] of a domestic animal should make compensation for it, soul for soul.
the same Hebrew word for soul is applied to both people and animals.
Gen. 9:5: Besides that, your blood of your souls [or, lives; Hebrew, from ne′phesh] shall I ask back. Here the soul is said to have blood.
Josh. 11:11: They went striking every soul [Hebrew, ne′phesh] that was in it with the edge of the sword. The soul can be touched by the sword, its the physical part of us.