Good news! Using the request feature I got littlefoot and Platinum back! (Her name is now copper) But in a few in-game days after, Littlefoot sadly died to a couple of raptors. I killed them soon after with my own raptor, Storm. Littlefoot was a great dinosaur. He would stand as a monument to guide me back home. He would always check on what I was doing by peeking through the window on my second floor.