Ok I just got done watching the demo for fnaf 4. Ok so in the last cut scene we finally know who did the bite of 87. It was golden Freddie. This child that we play as throughout the nights was scared by the animatronics at the time. (Spring-Bonnie/spring-trap and golden Freddy). His older brother I think got his friends at the little boys birthday party up to golden Freddy saying that the little one wanted to give golden Freddy a big kiss. Thus having the little ones frontal lobe being bitten off by golden Freddy.
