Jackie and Shadow's chicks Sandy (Chick 1) and Luna (Chick 2) have some subtle differences. Friends of Big Bear Valley Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Jackie and Shadow’s newly named chicks Sandy and Luna are growing by leaps and bounds. While they pretty much look the same to the naked eye, there are some ways to tell them apart, according to Friends of Big Bear Valley (FOBBV).  Formerly called Chick 1, Sandy has a larger head and neck. It also has a slight curve to the interior of its beak. Sandy has also been the more submissive of the two so far. Luna (formerly Chick 2) is smaller and has a straighter beak. Previously, Luna has been a bit more aggressive, but their tussles or “bonking” have subsided and they appear to be bonding well.  Chick 1 is larger, has a larger head and neck and has a slight curve to its gape. Image: Friends of Big Bear Valley.…