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First off, there's this article.
https://www.nutritruth.org/single-post/claim-tractor-supply-chicken-feed-allegedly-laced-with-ingredients-causing-chickens-to-stop-laying
from the article:
Multiple online sources, many of them hen farmers, say that ever since Tractor Supply changed the Producer’s Pride formulation, their birds have gone desolate. This could be because of a reduction in the amount of protein contained in the feed, or it could be caused by other factors such as aflatoxin contamination.
Later in the article they call it 'feedgate'.