I watched the animation called Varmints at last Friday.
What is a message of it trying to convey?
I think that its message is the importance of nature and the stupidity of human beings.
In the beginning of the anime, the world is full of nature. However, human beings drive nature out and start to reign this world.
Do you remember a scene that the main character is attacked by something like water flood in the start? I think that it is a flood not of water but of concrete, which is a symbol of civilization of human beings.
Then, nature starts to revenge human beings by making clear that human civilization (namely our present life) don' keep to flourish forever. And, the ruler of this world will be or is already defeated by the supernatural power.