I trust that McDonald's can find a way to sell all-natural chicken without raising their prices; we did that at Shake Shack. It is more expensive, and we took a slight margin hit, but we did it. And if we can do it, I know that much bigger companies can.

In order to encourage the cattle farmers to raise a herd of all-natural cattle, which is a several-year process, they have to know that it's not just Shake Shack that wants to buy it. They have to have other buyers who are willing to pay more for all natural.

Some companies believe if they took over Knight Ridder, they could raise the margin, either by cutting costs or raising revenue.

My history has been to grow the roots as deeply as you can before going on to the next thing. That's why it took 10 years to go from Union Square Cafe to Gramercy Tavern, and another 10 years to go from Blue Smoke's first location to its second, and five to go from Shake Shack 1 to Shake Shack 2.

Shake Shack started off as a summer hot dog cart in Madison Square Park. It was not meant to be a company - it was completely accidental. It started off as an expression of community building.

The margin of error is so slight.