yes i have heard of this. I have this experience. we do not have host alter because she is sleeping and can not be waken. so we only have alters... children and teens. this usually happens in Exstreem abuse. I am not saying abuse is not exstreem but there are different severity. If host is exsteemly traumatized as child/ infant he/she may not be able to cope and want to deal or go at all so he she goes to sleep and in so sending others to take over and usually putting one alter in charge.