based on a true story of 4 lions escaping the baghdad zoo during the armed conflict in iraq, there is alot of symbolism here:
pacifism vs rebelling,
the idea of HOW freedom is actually won (like if it's given - as opposed to taken, or fought for - is it real?)
and how to keep your humanity/morals in the face of war.

of course the lions are shot dead in the end (obliterated actually) and their beauty, and nobility, and tenacious loyalty are for nought.
pretty much the summation of war.