I had originally taken the first pic without the shell and my buddy and I walked away. He told me we need to get a pic with something showing the relation to the size. We walked back up and laid the shell beside the print and took the second pic. It is possible one of usor my dog disturbed the track when leaving the first time. I noticed this as well (on the toe print on far right side by shell) after I uploaded the pic to my laptop. The second photo was for the purpose of showing the size. The first was taken as "proof".