Just found out that Vital Farms is feeding their chickens "unprocessed soymeal."
Thankfully I easily found an organic brand that is soy-free, and I have switched over for good.
Be careful out there, lads.
I needed some numbers on PUFA consumption and found this study:
Blasbalg et al. (2011) Changes in consumption of omega-3 and omega-6 fatty acids in the United States during the 20th century
Here, a few excerpts:
"[...] To our knowledge, no estimate of changes in the n23 or n26 tissue status...