I did some reading on it and you're right it is poisonous. I heard back from them and they confirmed it is a tung tree. It is a native tree to china apparently. It is considered an invasive tree. They say it is a nice tree when it blooms though. Think I'll chop it down. I don't need my dog or anyone getting sick or dying because of it.
It was grown heavily around southern states I think back in early 1900 for the oils. It grows here and there and some places between ms/la it grows all over. Used to farm them and I guess the seed has been spread over the years.