I am curious where your birds would even contract E. Coli......doesn't seem like a very common disease for backyard chickens....I'm curious about that and need to do a little reading I guess...I work at a feed store here in Boise and I am affectionately known as "The Chicken Lady" in our company
So I like things like learning new things like this...Sour crop is when food does not pass through the crop and rots there, unless I am mistaken....Impacted crop is where food simply gets stuck, Internal laying is like EYP. It's where an egg does not fully form but the hens system continues to try to pass it through. If it gets stuck anywhere, and starts to fester, you get a bacterial infection that can be deadly...EYP.