diff --git a/Shared/PlasmaShared/IContentService/ResourceData.cs b/Shared/PlasmaShared/IContentService/ResourceData.cs
index 79a59d8c3e..0218d06be1 100644
--- a/Shared/PlasmaShared/IContentService/ResourceData.cs
+++ b/Shared/PlasmaShared/IContentService/ResourceData.cs
@@ -12,6 +12,7 @@ public class ResourceData: ApiResponse
         public bool? MapIs1v1;
         public bool? MapIsTeams;
         public bool? MapIsFfa;
+        public bool? MapIsChickens;
         public bool? MapIsSpecial;
         public bool? MapIsSupported;
         public float? FeaturedOrder;
diff --git a/Zero-K.info/AppCode/LadderCalculator.cs b/Zero-K.info/AppCode/LadderCalculator.cs
index 7ae7463221..e89d5fcb83 100644
--- a/Zero-K.info/AppCode/LadderCalculator.cs
+++ b/Zero-K.info/AppCode/LadderCalculator.cs
@@ -143,4 +143,4 @@ public class AwardModel
         }
 
     }
-}
\ No newline at end of file
+}
diff --git a/Zero-K.info/AppCode/PlasmaServer.cs b/Zero-K.info/AppCode/PlasmaServer.cs
index 2ae73addad..4c573153a7 100644
--- a/Zero-K.info/AppCode/PlasmaServer.cs
+++ b/Zero-K.info/AppCode/PlasmaServer.cs
@@ -29,6 +29,7 @@ public static ResourceData ToResourceData(Resource r)
                  MapIs1v1 = r.MapIs1v1,
                  MapIsTeams = r.MapIsTeams,
                  MapIsFfa = r.MapIsFfa,
+                 MapIsChickens = r.MapIsChickens,
                  MapIsSpecial = r.MapIsSpecial,
                  MapSupportLevel = r.MapSupportLevel
              };
diff --git a/ZkData/Ef/WHR/RatingSystems.cs b/ZkData/Ef/WHR/RatingSystems.cs
index 2820b52fe2..d186a9fa68 100644
--- a/ZkData/Ef/WHR/RatingSystems.cs
+++ b/ZkData/Ef/WHR/RatingSystems.cs
@@ -97,6 +97,7 @@ public static void FillApplicableRatings(SpringBattle battle, SpringBattleContex
             if (battle.IsMission) return;
             if (battle.SpringBattlePlayers?.Where(x => !x.IsSpectator).Select(x => x.AllyNumber).Distinct().Count() < 2) return;
             if (battle.ResourceByMapResourceID?.MapIsSpecial == true) return;
+            if (battle.ResourceByMapResourceID?.MapIsChickens == true) return;
             
             //only count balanced custom matches for elo
             if (battle.Mode == AutohostMode.None && battle.SpringBattlePlayers?.Where(x => !x.IsSpectator).GroupBy(x => x.AllyNumber).Select(x => x.Count()).Distinct().Count() > 1) return;