There's a certain pureness and wonder evoked by seeing a character enter their world for the first time, before all chaos breaks loose and they're forced to deal with it. This is quite well-written, and does indeed function as a standalone. Getting inside the hatchling's head as he discovers that he can make 'me sounds', and registers Mender as a dim patch of light and so on strongly accentuate the impression. His labelling her as 'Mama' was a good transition point to her perspective. Little moments like the way he chose Mender's killing claw as a cuddling spot, or had his hiding instincts triggered help make it organic. Are your hidden runners somewhat different from the seemingly harmless one in the series? Within my canon at least, true hidden runners are a subspecies of utahraptor capable of active camouflage so as to appear nearly invisible. Camouflage techniques aside, I hope I didn't overlap with your idea too much. Are tiny biters compsaurgnathuses, or 'compies', as Jurassic Park nicknames them? Anyway, great work!