Mr PKV has a timetable of 1970s. In that the menu for a non-veg thali contained mutton, chicken, fish or egg. Those days getting chicken was difficult and expensive and mutton was staple with egg and fish was regional. Then in early 1980s the poultry boom happened and the price of chicken in the market reduced, And now Mutton is almost double the price of Chicken and eggs have become value for money