diff --git a/NEWS b/NEWS
index 2f790e653..064b9db10 100644
--- a/NEWS
+++ b/NEWS
@@ -23,6 +23,7 @@ DFHack Future
         tradereq-pet-gender: Displays pet genders on the trade request screen
     Removed
     Misc Improvements
+        catsplosion: Can now trigger pregnancies in (most) other creatures
         exportlegends: 'info' and 'all' exports legends_plus xml with more data for legends utilities
         remotefortressreader: Exposes more information
 
diff --git a/plugins/catsplosion.cpp b/plugins/catsplosion.cpp
index 1e68268eb..eee39a996 100644
--- a/plugins/catsplosion.cpp
+++ b/plugins/catsplosion.cpp
@@ -50,9 +50,31 @@ DFhackCExport command_result plugin_shutdown ( color_ostream &out )
 
 command_result catsplosion (color_ostream &out, std::vector <std::string> & parameters)
 {
+    if (!Core::getInstance().isWorldLoaded())
+    {
+        out.printerr("World not loaded.\n");
+        return CR_FAILURE;
+    }
+    bool list_only = false;
     list<string> s_creatures;
-    // only cats for now.
-    s_creatures.push_back("CAT");
+    if (parameters.size())
+    {
+        for (size_t i = 0; i < parameters.size(); i++)
+        {
+            if (parameters[i] == "list")
+            {
+                list_only = true;
+            }
+            else
+            {
+                s_creatures.push_back(parameters[i]);
+            }
+        }
+    }
+    else
+    {
+        s_creatures.push_back("CAT");
+    }
     // make the creature list unique ... with cats. they are always unique
     s_creatures.unique();
     // SUSPEND THE CORE! ::Evil laugh::
@@ -61,7 +83,7 @@ command_result catsplosion (color_ostream &out, std::vector <std::string> & para
     uint32_t numCreatures;
     if(!(numCreatures = Units::getNumCreatures()))
     {
-        cerr << "Can't get any creatures." << endl;
+        out.printerr("Can't get any creatures.\n");
         return CR_FAILURE;
     }
 
@@ -70,8 +92,6 @@ command_result catsplosion (color_ostream &out, std::vector <std::string> & para
     int totalcreated=0;
     string sextype;
 
-    // shows all the creatures and returns.
-
     int maxlength = 0;
     map<string, vector <df::unit *> > male_counts;
     map<string, vector <df::unit *> > female_counts;
@@ -93,17 +113,16 @@ command_result catsplosion (color_ostream &out, std::vector <std::string> & para
         }
     }
 
-    // print (optional)
-    //if (showcreatures == 1)
+    if (list_only)
     {
-        out.print("Type                 Male # Female #\n");
-        for(auto it1 = male_counts.begin();it1!=male_counts.end();it1++)
+        out.print("Type                   Male # Female #\n");
+        for (auto it1 = male_counts.begin(); it1!=male_counts.end(); it1++)
         {
-            out.print("%20s %6d %8d\n", it1->first.c_str(), it1->second.size(), female_counts[it1->first].size());
+            out.print("%22s %6d %8d\n", it1->first.c_str(), it1->second.size(), female_counts[it1->first].size());
         }
+        return CR_OK;
     }
 
-
     // process
     for (list<string>::iterator it = s_creatures.begin(); it != s_creatures.end(); ++it)
     {
@@ -137,6 +156,11 @@ command_result catsplosion (color_ostream &out, std::vector <std::string> & para
         out.print("%d pregnancies accelerated.\n", totalchanged);
     if(totalcreated)
         out.print("%d pregnancies created.\n", totalcreated);
+    if (!totalcount)
+    {
+        out.printerr("No creatures matched.\n");
+        return CR_FAILURE;
+    }
     out.print("Total creatures checked: %d\n", totalcount);
     return CR_OK;
 }