My answer here is not a “TE” answer, but just an ordinary answer as would be given by many a believer who has read and reflected on his Bible. I think sin is a human problem. Non-human animals cannot sin. Our theology of sin does not extend to them, but only to humans (and not even all of them, if one allows for an “age of accountability” as alluded to in scripture).
I don’t intend to get into everything you raise because much of it seems quite beside the main points to me. But …
What do you know about my “denominational theology”? Do you even know what denominational tradition I’m a part of? And no - there is no such thing as a “Theistic Evolutionist” denomination. That’s just a moniker for the many thinking Christians over many denominations who have no problem understanding that God can make use of evolutionary processes if God chooses to do so.