Tiassa, which version do you prefer? I grew up on the KJV, and I can't stand the NRE or the NKJV. Sadly I don't read classical Greek, or I'd have that to bitch about as well..
I use the
Revised Standard Version (RSV)↱, which in this case,
Mk. 16.15↱, reads, "Go into all the world and preach the gospel to the whole creation". This is also how the
New American Standard Bible (NASB)↱ renders the verse, and I mention that one because it is often used in nonsectarian university teaching of Christian history and philosophy, and if I still have an actual paper Bible sitting around, somewhere, it would be that one.
Douay-Rheims↱, the sixteenth-century Catholic translation to English, reflects the topic post, "And he said to them: Go ye into the whole world, and preach the gospel to every creature", as does
KJV↱.
Considering the verse and question at hand, "Do any theists preach to animals?" the answer is and always has been affirmative, but it is difficult to figure how to inform properly in answering such a vague and inconsiderate inquiry; Mark 16 pertains to the Resurrection and frailty of faith and for our purposes the answer to the question is actually right there for the reading. In this telling, Mary Magdalene delivers the Gospel unto the Apostles:
But when they heard that he was alive and had been seen by her, they would not believe it. After this he appeared in another form to two of them, as they were walking into the country. And they went back and told the rest, but they did not believe them. Afterward he appeared to the eleven themselves as they sat at table; and he upbraided them for their unbelief and hardness of heart, because they had not believed those who saw him after he had risen. And he said to them, "Go into all the world and preach the gospel to the whole creation. He who believes and is baptized will be saved; but he who does not believe will be condemned. And these signs will accompany those who believe: in my name they will cast out demons; they will speak in new tongues; they will pick up serpents, and if they drink any deadly thing, it will not hurt them; they will lay their hands on the sick, and they will recover." So then the Lord Jesus, after he had spoken to them, was taken up into heaven, and sat down at the right hand of God. And they went forth and preached everywhere, while the Lord worked with them and confirmed the message by the signs that attended it. Amen.
(]Mk.16.11-20, RSV↱; boldface accent added )
The differences 'twixt the Synoptic Gospels can be argued to reflect politics in history; Elaine Pagels, in
The Origin of Satan (1995) discusses the implications of history within the framework of the Gospels; the inclusion of serpents in Mk. 16.18 makes certain sense within that context, as it has particular symbolic value in appeals to both Jews and pagans during an historically transitional period. Toward our end, though, yes, the Holy Spirit can deliver unto serpents; the question was resolved centuries before its asking.