I do realize that there are a few possible solutions for this and the last few puzzles before it. I tested them and tried to make them logical, but couldn't quite do it without ruining the picture. These particular footprints were just so cool that I really wanted to publish them anyway. So I had to settle for mostly-logical-and-easily-guessable-at-the-end. Sorry if that bugs you, but I hope you have a mostly good time solving these puzzles!