Very interesting. The tracks are there so this event happened but there are lots of things to wonder about.

The article says the small child (approximately 5'2" tall, how tall was an adult in those days?) was walking in the back of the deep cave with his buddy the wolf-dog. With no adult supervision? Nobody noticed him wandering off or went to search for him? So, this small child had enough wit about himself to carry a torch and also knew how to clean the torch and keep it going. I don't know much about caves but I assume there would be enough air flow to keep the torch burning.

There must have been enough of an increase in the air flow to dry out the clay soon after the tracks were made to preserve them for thousands of years. But then nobody else other than this small child and his wolf-dog were curious enough to explore the cave before it dried out.

At some point the walls of the cave dried out enough to hold whatever primitive paint these guys had to make their drawings. Going from a mud floor to walls dry enough to paint on would take some serious air flow.

The floor of the deep cave was semi firm mud at the time so the explorers left tracks going in. Why was the floor muddy? Did it periodically flood? So it apparently didn't flood after the tracks were left or the tracks would have been washed away. Was the floor wet because of seepage and water percolating through the cave ceiling? Why weren't the tracks dissolved?

Were the tracks made at the only time in thousands of years of geological history that conditions were perfect for leaving them preserved for us to speculate on?

Apparently so because there they are...