Do Delilah's Replicas Count as Kills?

Note that killing the replicas DO NOT count as kills.

What counts as kills in Dishonored?

You shoot an NPC directly, kill them with your sword, or cause a lethal explosion. This includes all humans as well as Nest Keepers. You cause an NPC to drop a grenade and blow up, whether by action or indirect bone charm skill. An NPC falls into water and drowns.

How do I get rid of Delilah non lethal?

As soon as the hounds escape, use the heart on Delilah to start a short cutscene. Note! It is REQUIRED to use the heart on Delilah to kill her and to eliminate her non-lethally. If you do not do that and attack her instead, you will die instantly, because you will be unable to kill her (she is invincible).