"Would you exclude a global flood about 4,400 years ago as causing the dino extinction?"
If course
The dinos were all gone and were never replenished upon the earth 1000 years ago before the flood of Noah's day came
The dynos went extinct because of the Lord's judgment against Satan's rebellion
I an not aware of the bible discussing dinosaurs (I do not believe that Leviathan and Behemoth are dinosaurs). So, I don't know where dinosaurs fit into the creation story. Don't misunderstand...I believe the Word of God to be true, I just try not to force things in that aren't there.
So, perhaps dinosaurs died about 1,654 YFC (Years from creation) during the flood. Or maybe their remains carried over from a previous existence (earth cycle) not written in the bible - I am not saying that I believe this, but it has crossed my mind. I have not located enough information FROM THE BIBLE to even place them in our earth cycle, if you will.
So...human curiosity makes me want to know, but it is not a salvation issue or God would have let us know. However, I believe that it can become a salvation issue when you let the words of men discredit the Word of God.