Why Lionel Messi didn't grow up?

In poor health.

The puma "Messi" has been weak and sick since birth because of premature birth, and its size is much smaller than that of a normal puma. The zoo judged that Messi might not grow up healthily.

This puma named Messi could not survive in the wild because of physical defects, and was taken home as a cat by the fighting nation.