Simply questions to answer
Geologist and priest Michael Roberts is convinced the earth is 4.6 billion years old. He shares ten questions he’d like to ask Christians who believe the earth is only 6,000-10,000 years old
Source: 10 questions to ask a young earth creationist – Premier Christianity
I recall an “inverse” Chic Track that you posted some 6 months ago or so made the point that grace was present before the fall. The animal death seems to be somewhat tied to creationist’s notion of no death before the fall. I guess the tie is a little tenuous, but it might be worth developing your argument 6 a little more around the requirement of grace before the fall. I think it might be important to decouple grace with death before the fall. It seems one that they try to use as justification for holding their view.