It may be a translation issue here. The Biblical Hebrew word for spirit is ruah, meaning wind, breath, inspiration; the noun is grammatically feminine. Every being that has breath has ruah.
That does not, however, imply an immortal soul. "Thou takest their breath from them, and they die..." says Scripture.
The Greek New Testament uses four different words: Psyche, originally meaning butterfly or moth, later expanded to mean life, soul, ghost, departed spirit. Thymos, meaning breath, life, soul, temper, courage, will. Pneuma, meaning breath, mind, spirit, angel. Noös, meaning mind, reason, intellect.
That's why simple proof-texting doesn't work here. You have to dig to get the author's exact usage of the word, before you make any comparison between texts.
Dogs in heaven? I always told my kids that they will have perfect bliss in heaven. If (IF!!) they need their dog there for them to have perfect bliss, the dog'll be there. If...
My dogs exhibit some very human emotions, joy, grief, loyalty, love, fear, confidence, anger, guilt, etc. And they are able to make choices.
One wonders if there might be other intelligences, perhaps alien, that are to us as we are to our dogs.