Grass-Fed Wagyu Explained: Why It’s NOT Always Yellow

Grass-fed beef always has yellow fat… right?

Not always.

In this episode of The Meat Dudes, we chat with returning guest Andrew Shirley of River Valley Wagyu (Olympia, Washington) — a 100% grass-fed, no-grain-ever, full-blood Wagyu rancher — to break down what “grass-fed” actually means and why the yellow-fat test can be misleading.

We dig into what really drives fat color (forage, beta carotene, age, breed, and region), why Washington grass-fed can look different than Florida, and how “terroir” shows up in beef the same way it does in wine.

We also cover:

• Can grass-fed Wagyu consistently hit prime-level marbling?
• Genetics vs feed — and why marbling genes matter more on grass
• Regenerative / adaptive multi-paddock grazing (AMP) explained
• Why the grass-fed vs grain-fed debate gets oversimplified
• Favorite cuts, roasts, and solving the “whole cow” problem

If you care about transparency, flavor, nutrition, and understanding beef beyond the labels — this one’s for you.

Stay meat curious.

Find River Valley Wagyu: rivervalleywagyu.com