So, I have the worst memory when it comes to names, but I cam remember this movie as if I saw it yesterday, please help....

Here are the facts:
-there is a school for little animals in a forest
-One day a driver on a near by road throughs out a bottle
-A gas tank/ truck runs over the bottle and turns over
-sends gas through forest killing everything including little animals parents
-But not little animals because they are at school
-When little animals return one little skunk runs into her home and gets sick
-Other little animals must go on mission to find herb that will save her
-They run into an evil bird with one eye
-A construction site
- finally they find the herb on a mountain side
-they build their teacher's contraption to reach it
-then they fly the contraption home

I know I'm weird, but it has been bugging me for a while :confused:
-Rebecca

Was it 'once upon a forest'?

Thank You so much that was it! :D