riku i have to commend you, i am sorry you are getting flak at school because of this, just remember you have done the right thing here, that girl desperately needs help by the sound of it.
so not only have u helped this defenceless animal, you may have helped her too, she will maybe not thank you, but you can rest assured you have acted with great responsibility and maturity. Hang on in there riku those stares etc will stop eventually