The engineers were terrified of Mangle ... something was off with him.. He growled  and barked all the time.  He  was ok around kids despite being torn apart every hour.  But the employees knew rage was boiling into it the eyes...  he seemed pretty focused on Jeremy who looked  like Mr Afton.  Sometimes following him whenever he could get away from the toddlers.

Night came and Mangle was highly active he  was barreling on all 4's growling like a dog..  the other animontronics seemed to have became faster after he flew by.  It wasn't long before he was in the vent. Jeremy quickly put the  mask on  he didn't want Mangle in the office again.  The employees were  still trying to figure where Mangle had gotten a bone it took at least 6-7 people to be able to take it away from him.  The company however had quickly covered it up like usual.