Cheese Dragons are not actually alive. They are enchanted items of food that act almost identically to dragons. They have no need to eat, but they must “live” in humid environments or they will dry out and harden.

Eat More Cheese was born during that time worldwide when all the humans in all the caves had to spend a protracted amount of time at home alone in order to prevent the spread of a highly infectious virus. Oddly, the cheesemakers were one group that was badly impacted by the humans staying home, which kind of made sense given cheese doesn't stay viable for long and needs to be sold and eaten. Eat More Cheese took it upon himself to deliver cheese to all the homebound humans. The humans were happy, the cheesemakers were happy, and Eat More Cheese was happy because it meant the humans finally stopped eyeing him hungrily.