diff --git a/rats.py b/rats.py
index 1b8e3a5..eb72f6e 100644
--- a/rats.py
+++ b/rats.py
@@ -17,7 +17,7 @@ class MiceMaze:
         self.units = {}
         self.unit_positions = {}
         self.unit_positions_before = {}
-        for _ in range(5):
+        for _ in range(50):
             self.new_rat()
 
     def new_rat(self, position=None):