For us here, it sort of does. Many people don't eat beef here although there are many who do. So, in McDonald's, the choice will be McChicken or Fillet O Fish though they now also have Mc Spicy (which is a chicken burger). Shake Shack opened last year but they didn't serve chicken. Now, they just opened a new restaurant near where I used to work and will serve chicken. There is always a long queue so far so I haven't tried it.