diff --git a/Resources/Prototypes/DeltaV/ai_factions.yml b/Resources/Prototypes/DeltaV/ai_factions.yml
new file mode 100644
index 00000000000..783fc9d9889
--- /dev/null
+++ b/Resources/Prototypes/DeltaV/ai_factions.yml
@@ -0,0 +1,5 @@
+- type: npcFaction
+  id: Cat
+  hostile:
+  - Mouse
+  - SimpleHostile
diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml b/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
index e7d9f6f6364..8be302a5e2c 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
@@ -2867,6 +2867,12 @@
   - type: Tag
     tags:
     - VimPilot
+  - type: HTN # DeltaV - make all cats eat mice
+    rootTask:
+      task: SimpleHostileCompound
+  - type: NpcFactionMember # DeltaV - give cats faction so they fight mice
+    factions:
+    - Cat
 
 - type: entity
   name: calico cat
diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml b/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
index 3fe80c75c56..7733f0a4be6 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
@@ -135,6 +135,7 @@
   - type: NpcFactionMember
     factions:
       - PetsNT
+      - Cat # DeltaV
   - type: HTN
     rootTask:
       task: SimpleHostileCompound
@@ -158,6 +159,7 @@
   - type: NpcFactionMember
     factions:
       - PetsNT
+      - Cat # DeltaV
   - type: Grammar
     attributes:
       proper: true
diff --git a/Resources/Prototypes/Entities/Objects/Fun/toys.yml b/Resources/Prototypes/Entities/Objects/Fun/toys.yml
index 476f3e6cdfa..65ba53fcccf 100644
--- a/Resources/Prototypes/Entities/Objects/Fun/toys.yml
+++ b/Resources/Prototypes/Entities/Objects/Fun/toys.yml
@@ -666,6 +666,17 @@
     equippedPrefix: mouse
     slots:
     - HEAD
+  # Begin DeltaV additions: make cats attack mouse toys to play with them
+  - type: Damageable
+    damageContainer: StructuralInorganic # not actually destructible, just lets it be attacked
+  - type: MobState
+  - type: MobThresholds
+    thresholds:
+      0: Alive # always be considered alive
+  - type: NpcFactionMember
+    factions:
+    - Mouse
+  # End DeltaV additions
 
 - type: entity
   parent: BasePlushie