They are feeding, at the high range, 0.5% seaweed. A cow eats about 10kg of feed a day for 20 months before it is in turn eaten. That seems like 6000kg of feed

They are feeding, at the high range, 0.5% seaweed. A cow eats about 10kg of feed a day for 20 months before it is in turn eaten. That seems like 6000kg of feed which means 30kg of seaweed to make a 500kg cow. Algae to cow is likely a longer distance than cow to table, but one presumes the bulk of that is on rail and more efficient than the trucks used for feed to farm, cow to processor, and meat to table. Shipping the algae doesn’t seem like a deal breaker.