I hatch a set of Welsummer eggs about a week ago. The new primaries of 5 of 13 are slightly flipping out laterally instead of folding neatly under the secondaries as expected. It kind of reminds me of 'Angel Wing' in ducks. At first I thought it was just a developmental stage where the primaries are just growing too quickly for the size of the wing, but then it occurred to me that there may be something else going on. I couldn't find anyone saying split wing shows up this early--I think that a reference to 3 weeks was the earliest I found. Here are two examples: Chick one--more her right than her left Chick 2, more apparent: There are small feathers in between his primaries and secondaries but they are not very long. Have you all seen this in young (1 week old) chicks before and it not been something problematic?