Animals are conscious and should be treated as such

[Jade]

According to the Law of One, it's completely possible for an animal to house a 3D consciousness - Ra speaks specifically about it with Gandalf.

Ra: I am Ra. The entity, mind/body/spirit complex, Gandalf, being harvestable third density, is open to the same type of psychic attack to which you yourselves are vulnerable. Therefore, through the mechanism of images and dreams, it is potentially possible for negative concepts to be offered to this mind/body/spirit complex, thus having possible deleterious results. The entity, Fairchild, though harvestable through investment, does not have the vulnerability to attack in as great an amount due to a lack of the mind complex activity in the distortion of conscious devotion.

For protection of these entities we might indicate two possibilities. Firstly, the meditation putting on the armor of light. Secondly, the repetition of short ritual sentences known to this instrument from the establishment which distorts spiritual oneness for this instrument. This instrument’s knowledge will suffice. This will aid due to the alerting of many discarnate entities also aware of these ritual sentences. The meditation is appropriate at the time of the activity on behalf of these entities. The ritual may be repeated with efficacy from this time until the safe return, at convenient intervals.

It's very clear that second density beings are totally capable of being made harvestable towards third - and I don't discount the idea that even higher density beings might enspirit animal body complexes for a time.