Do animals eat the same things for their whole life?

The answer: no

Explanations:

While some animals, like koalas and pandas, have a specialized diet and eat the same thing throughout their lives, many animals change their diet as they grow and develop. For example, many young animals start out drinking milk from their mothers and then transition to a more varied diet as they get older. Additionally, some animals, such as bears and squirrels, store food in the fall to eat during the winter when food is scarce.