diff --git a/tests/test_persistence.py b/tests/test_persistence.py
index a3da1fa..1cdc3ff 100644
--- a/tests/test_persistence.py
+++ b/tests/test_persistence.py
@@ -1,4 +1,4 @@
-import time
+import pytest
 
 from untitled import content, migration, model, persistence, rules
 
@@ -47,7 +47,7 @@ def test_migration():
     assert "last_updated" in result["cat"]
 
 
-def test_decay_and_feed():
+def test_decay_and_replenish():
     cat = model.Save(
         version=content.SAVE_VERSION,
         cat=model.Cat(
@@ -58,12 +58,16 @@ def test_decay_and_feed():
                 "eyes": "blue",
                 "personality": "judges you silently",
             },
+            last_updated=0,
         ),
     )
-    rules.reconcile(cat.cat, time.time() + 3600)
+    rules.reconcile(cat.cat, 3600 * 2)
+    assert cat.cat.happiness < 98
     assert cat.cat.fullness < 98
     rules.feed(cat.cat)
-    assert cat.cat.fullness > 98 and cat.cat.fullness <= 100
+    assert cat.cat.fullness == pytest.approx(100)
+    rules.reconcile(cat.cat, 7200 + 20 * 3600)
+    assert cat.cat.happiness < 96 - (content.BASE_HAPPINESS_DECAY_PER_HOUR * 20)
 
 
 def test_list_saves(tmp_path):
diff --git a/untitled/content.py b/untitled/content.py
index 76a1186..bbcb926 100644
--- a/untitled/content.py
+++ b/untitled/content.py
@@ -4,8 +4,9 @@ GAME_NAME = "Untitled Cat Game"  # Titled Cat Game
 SAVE_VERSION = 2
 
 HUNGER_DECAY_PER_HOUR = 5
-BASE_HAPPINESS_DECAY_PER_HOUR = 5
-
+BASE_HAPPINESS_DECAY_PER_HOUR = 2
+HUNGER_SADNESS_THRESHOLD = 30
+HUNGER_SADNESS_PENALTY_PER_HOUR = 5
 CAT_COLORS = [
     "orange tabby",
     "black",
diff --git a/untitled/migration.py b/untitled/migration.py
index 514b307..abf628e 100644
--- a/untitled/migration.py
+++ b/untitled/migration.py
@@ -3,6 +3,7 @@ import time
 
 def _v1_to_v2(data):
     data["cat"]["fullness"] = 100
+    data["cat"]["happiness"] = 100
     data["cat"]["last_updated"] = time.time()
     data["version"] = 2
     return data
diff --git a/untitled/rules.py b/untitled/rules.py
index bb8d7dd..ac2d984 100644
--- a/untitled/rules.py
+++ b/untitled/rules.py
@@ -17,20 +17,34 @@ def validate_cat_name(name, auto_gen=False):
         return "Your cat's name needs at least 1 letter."
 
 
+def _clamp(value, low=0, high=100):
+    if value < low:
+        return low
+    if value > high:
+        return high
+    return value
+
+
 def reconcile(cat: model.Cat, now):
     elapsed_hours = (now - cat.last_updated) / 3600
     if elapsed_hours <= 0:
         return
     cat.fullness -= content.HUNGER_DECAY_PER_HOUR * elapsed_hours
-    if cat.fullness < 0:
-        cat.fullness = 0
+    cat.fullness = _clamp(cat.fullness)
+
     cat.happiness -= content.BASE_HAPPINESS_DECAY_PER_HOUR * elapsed_hours
-    if cat.happiness < 0:
-        cat.happiness = 0
+    if cat.fullness < content.HUNGER_SADNESS_THRESHOLD:
+        cat.happiness -= content.HUNGER_SADNESS_PENALTY_PER_HOUR * elapsed_hours
+    cat.happiness = _clamp(cat.happiness)
+
     cat.last_updated = now
 
 
 def feed(cat, amount=100):
     cat.fullness += amount
-    if cat.fullness > 100:
-        cat.fullness = 100
+    cat.fullness = _clamp(cat.fullness)
+
+
+def excite(cat, amount=100):
+    cat.happiness += amount
+    cat.happiness = _clamp(cat.happiness)
diff --git a/untitled/screens/house.py b/untitled/screens/house.py
index 3eb44e5..1061be5 100644
--- a/untitled/screens/house.py
+++ b/untitled/screens/house.py
@@ -8,17 +8,22 @@ def house(save: model.Save):
     print("Welcome to your house!")
     while True:
         match ui.select(
-            "What do you want to do?", ["Check on your cat", "Feed your cat", "Menu"]
+            "What do you want to do?",
+            ["Check on your cat", "Feed your cat", "Pet your cat", "Menu"],
         ):
             case "Check on your cat":
                 rules.reconcile(save.cat, time.time())
                 print(
-                    f"{save.cat.name}, {generation.generate_trait_sentence(save.cat.traits).lower()}\nFullness: {round(save.cat.fullness,1)}"
+                    f"{save.cat.name}, {generation.generate_trait_sentence(save.cat.traits).lower()}\nFullness: {round(save.cat.fullness,1)}\nHappiness: {round(save.cat.happiness,1)}"
                 )
             case "Feed your cat":
                 rules.reconcile(save.cat, time.time())
                 rules.feed(save.cat)
                 print(f"You feed {save.cat.name}, {save.cat.name} is now full.")
+            case "Pet your cat":
+                rules.reconcile(save.cat, time.time())
+                rules.excite(save.cat)
+                print(f"You pet {save.cat.name}, {save.cat.name} is now happy.")
             case "Menu":
                 result = options()
                 match result: