I noticed one of my 5 day old baby chicks is keeping one of it's legs drawn up and laying down a lot. It can walk/scurry, but it limps. I assume it got injured somehow bc it wasn't like that this morning. Do I need to separate it or can I leave it with Mama? The Mama will peck/scoot it a bit if she notices that it's been laying down a while. Then the chick gets up and scurries around a minute. Just not sure what to do.