How these claims are verified
This directory makes two specific claims about each yarn. Every one of them is either backed by a source you can check yourself, or marked as unknown.
The two claims
Milled in the USA: the yarn was spun into its finished form at a mill in the United States.
Fiber from US animals: the fiber was grown on animals raised in the United States. Blends must be mostly from a US source to qualify. Note, a yarn with imported merino and domestic nylon is not included in the list.
What counts as a source
A citation must point at source that can be checked. This will probably be the product page but could be a news article, video, podcast, and really anything from the owners themselves. Quotes included but you can always verify the claim work.
Corrections
If a claim here is wrong, or you have a source that would change an unknown, please send it.