I want to note that your character has the opportunity to question Kagha's action as it does not pertain to NORMAL DRUIDS. Without giving spoilers, the kid's death does set the tone of Kagha's character and this makes more sense when you stick your nose where it shouldn't be.
Yes, it IS traumatic for the kid to die. While i saved her the first try with my PC lock (no reason to fail really) you ABSOLUTELY SHOULD have another way to save the little one, acrobatics, athletics, etc...or you know maybe taking the bite instead of her and wandering around with perma poison till you cure it.