Cows grazing in a field

How to feed a cow seaweed

Our Gamechanger patty all starts with the same grass-fed, free-range Aussie-reared black Angus. Like the cattle we use for our regular beef burgers. Still 100% natural, with no added hormones, preservatives or antibiotics.

The only difference? Natural Asparagopsis sea feed from our mates at Sea Forest.

Sounds sea-weird

It's not! The cows roam on grassy, green Flinders farmland, chomping a mix of fresh grass and that innovative seaweed pellet that massively reduces the burpin’ methane output.

How massive? Up to 67% so far – and we’re aiming for 90%.

Best part is, our Asparagopsis pellets are an all-natural feed. That means we can stay true to our 100% natural promise!

Plus, it’s still got that same juicy, beefy taste you love in your Grill’d burgers. Not a hint of seaweed, at all.

Wait, seaweed and grass?


The pellet in their diet is enough to take a huge bite out of their overall methane emissions. That means we can still maintain the good animal welfare and fresh grazing lifestyle that makes cows happy (and healthy).

How do cows eat asparagopsis seaweed?

First up, cows actually LOVE the seaweed pellets. They’re big fans of the taste.

For the actual feeding, we use a piece of equipment called a GreenFeeder machine. The cow comes up, puts its head into the covered trough to eat the seaweed pellets.

Because cows burp as they eat (rude), the same machine also measures the methane – and that’s how we know it’s working.

What is asparagopsis?

Asparagopsis is a native Australian red algae seaweed. This edible seaweed captures carbon through photosynthesis, helping to clean and de-acidify the ocean.

Sea Forest is the first organisation in the world to grow this commercial quantity, in the pristine waters of Tasmania and it’s enough for 2.6 million cattle. That’s 10% of Australia’s herd.

Planet-savin' beef burgers

For just one extra dollar, your choice can help change the world. Doing good never tasted so delicious.

Available at selected restaurants.