u/Altruistic_Rub_7662

My little bottle baby foster fails didn’t toast up much at all…

Asher has heavily toasted (and gotten chunkier) since I got him as a stray

I live in Kansas and found these eggs. The one is very obviously not viable, but the other has a dark spot in it, and an air pocket, but no visible veining. I’m not getting my hopes up that it is viable, but are there ways to tell a definite no or yes? Or should I just incubate it and check again in a couple days? Also, any ideas what kind of bird they may have been? (No wildlife rehabilitation centers are open in my area until Monday)