Index: binaries/data/mods/public/gui/session/unit_commands.js
===================================================================
--- binaries/data/mods/public/gui/session/unit_commands.js
+++ binaries/data/mods/public/gui/session/unit_commands.js
@@ -135,7 +135,10 @@
 	let playerStates = GetSimState().players;
 	let playerState = playerStates[Engine.GetPlayerID()];
 
-	if (g_IsObserver || entStates.every(entState => controlsPlayer(entState.player)))
+	// Always show selection.
+	setupUnitPanel("Selection", entStates, playerStates[entStates[0].player]);
+
+	if (g_IsObserver || entStates.every(entState => controlsPlayer(entState.player) && (!entState.unitAI || entState.unitAI.isControllable)))
 	{
 		for (let guiName of g_PanelsOrder)
 		{
Index: binaries/data/mods/public/simulation/components/GuiInterface.js
===================================================================
--- binaries/data/mods/public/simulation/components/GuiInterface.js
+++ binaries/data/mods/public/simulation/components/GuiInterface.js
@@ -355,6 +355,7 @@
 			"canPatrol": cmpUnitAI.CanPatrol(),
 			"selectableStances": cmpUnitAI.GetSelectableStances(),
 			"isIdle": cmpUnitAI.IsIdle(),
+			"isControllable": cmpUnitAI.IsControllable()
 		};
 
 	let cmpGuard = Engine.QueryInterface(ent, IID_Guard);
Index: binaries/data/mods/public/simulation/components/UnitAI.js
===================================================================
--- binaries/data/mods/public/simulation/components/UnitAI.js
+++ binaries/data/mods/public/simulation/components/UnitAI.js
@@ -24,6 +24,9 @@
 	"<element name='CanPatrol'>" +
 		"<data type='boolean'/>" +
 	"</element>" +
+	"<element name='Controllable'>" +
+		"<data type='boolean'/>" +
+	"</element>" +
 	"<optional>" +
 		"<interleave>" +
 			"<element name='NaturalBehaviour' a:help='Behaviour of the unit in the absence of player commands (intended for animals)'>" +
@@ -187,8 +190,8 @@
 
 	// Called when being told to walk as part of a formation
 	"Order.FormationWalk": function(msg) {
-		// Let players move captured domestic animals around
-		if (this.IsAnimal() && !this.IsDomestic() || this.IsTurret())
+		// Turrets can't be ordered to walk.
+		if (this.IsTurret())
 		{
 			this.FinishOrder();
 			return;
@@ -234,13 +237,6 @@
 	// (these will switch the unit out of formation mode)
 
 	"Order.Stop": function(msg) {
-		// We have no control over non-domestic animals.
-		if (this.IsAnimal() && !this.IsDomestic())
-		{
-			this.FinishOrder();
-			return;
-		}
-
 		// Stop moving immediately.
 		this.StopMoving();
 		this.FinishOrder();
@@ -254,8 +250,8 @@
 	},
 
 	"Order.Walk": function(msg) {
-		// Let players move captured domestic animals around
-		if (this.IsAnimal() && !this.IsDomestic() || this.IsTurret())
+		// Turrets can't be ordered to walk.
+		if (this.IsTurret())
 		{
 			this.FinishOrder();
 			return;
@@ -280,8 +276,8 @@
 	},
 
 	"Order.WalkAndFight": function(msg) {
-		// Let players move captured domestic animals around
-		if (this.IsAnimal() && !this.IsDomestic() || this.IsTurret())
+		// Turrets can't be ordered to walk.
+		if (this.IsTurret())
 		{
 			this.FinishOrder();
 			return;
@@ -307,8 +303,8 @@
 
 
 	"Order.WalkToTarget": function(msg) {
-		// Let players move captured domestic animals around
-		if (this.IsAnimal() && !this.IsDomestic() || this.IsTurret())
+		// Turrets can't be ordered to walk.
+		if (this.IsTurret())
 		{
 			this.FinishOrder();
 			return;
@@ -455,7 +451,8 @@
 	},
 
 	"Order.Patrol": function(msg) {
-		if (this.IsAnimal() || this.IsTurret())
+		// Turrets can't be ordered to walk.
+		if (this.IsTurret())
 		{
 			this.FinishOrder();
 			return;
@@ -3232,6 +3229,7 @@
 	this.isGarrisoned = false;
 	this.isIdle = false;
 	this.finishedOrder = false; // used to find if all formation members finished the order
+	this.isControllable = this.template.Controllable == "true";
 
 	this.heldPosition = undefined;
 
@@ -3340,6 +3338,20 @@
 	return (state == "WALKING");
 };
 
+UnitAI.prototype.IsControllable = function()
+{
+	return this.isControllable;
+};
+
+/**
+ * Set whether the entity is controllable.
+ * @param {boolean} bool - Q.e.d.
+ */
+UnitAI.prototype.SetControllable = function(bool)
+{
+	this.isControllable = bool;
+};
+
 /**
  * Return true if the current order is WalkAndFight or Patrol.
  */
Index: binaries/data/mods/public/simulation/components/tests/test_UnitAI.js
===================================================================
--- binaries/data/mods/public/simulation/components/tests/test_UnitAI.js
+++ binaries/data/mods/public/simulation/components/tests/test_UnitAI.js
@@ -68,7 +68,7 @@
 		"IsInTargetRange": (ent, target, min, max, opposite) => true
 	});
 
-	var unitAI = ConstructComponent(unit, "UnitAI", { "FormationController": "false", "DefaultStance": "aggressive" });
+	var unitAI = ConstructComponent(unit, "UnitAI", { "FormationController": "false", "DefaultStance": "aggressive", "Controllable": "true" });
 
 	AddMock(unit, IID_Identity, {
 		GetClassesList: function() { return []; },
@@ -128,7 +128,7 @@
 		});
 
 	var controllerFormation = ConstructComponent(controller, "Formation", {"FormationName": "Line Closed", "FormationShape": "square", "ShiftRows": "false", "SortingClasses": "", "WidthDepthRatio": 1, "UnitSeparationWidthMultiplier": 1, "UnitSeparationDepthMultiplier": 1, "SpeedMultiplier": 1, "Sloppyness": 0});
-	var controllerAI = ConstructComponent(controller, "UnitAI", { "FormationController": "true", "DefaultStance": "aggressive" });
+	var controllerAI = ConstructComponent(controller, "UnitAI", { "FormationController": "true", "DefaultStance": "aggressive", "Controllable": "true" });
 
 	AddMock(controller, IID_Position, {
 		JumpTo: function(x, z) { this.x = x; this.z = z; },
@@ -225,7 +225,7 @@
 
 		units.push(unit + i);
 
-		var unitAI = ConstructComponent(unit + i, "UnitAI", { "FormationController": "false", "DefaultStance": "aggressive" });
+		var unitAI = ConstructComponent(unit + i, "UnitAI", { "FormationController": "false", "DefaultStance": "aggressive", "Controllable": "true" });
 
 		AddMock(unit + i, IID_Identity, {
 			GetClassesList: function() { return []; },
@@ -277,7 +277,7 @@
 	});
 
 	var controllerFormation = ConstructComponent(controller, "Formation", {"FormationName": "Line Closed", "FormationShape": "square", "ShiftRows": "false", "SortingClasses": "", "WidthDepthRatio": 1, "UnitSeparationWidthMultiplier": 1, "UnitSeparationDepthMultiplier": 1, "SpeedMultiplier": 1, "Sloppyness": 0});
-	var controllerAI = ConstructComponent(controller, "UnitAI", { "FormationController": "true", "DefaultStance": "aggressive" });
+	var controllerAI = ConstructComponent(controller, "UnitAI", { "FormationController": "true", "DefaultStance": "aggressive", "Controllable": "true" });
 
 	AddMock(controller, IID_Position, {
 		GetTurretParent: function() { return INVALID_ENTITY; },
Index: binaries/data/mods/public/simulation/helpers/Commands.js
===================================================================
--- binaries/data/mods/public/simulation/helpers/Commands.js
+++ binaries/data/mods/public/simulation/helpers/Commands.js
@@ -877,6 +877,25 @@
 }
 
 /**
+ * Sends a GUI notification about entities that can't be controlled.
+ * @param {number} entity - The entity-ID of the unit that cannot be controlled.
+ * @param {number} player - The player-ID of the player that needs to receive this message.
+ */
+function notifyOrderFailure(entity, player)
+{
+	let cmpIdentity = Engine.QueryInterface(entity, IID_Identity);
+	let cmpGUIInterface = Engine.QueryInterface(SYSTEM_ENTITY, IID_GuiInterface);
+	cmpGUIInterface.PushNotification({
+		"type": "text",
+		"players": [player],
+		"message": sprintf(markForTranslation("Some %(unit)s can't be controlled."), {
+			"unit": cmpIdentity.GetGenericName()
+		}),
+		"translateMessage": true
+	});
+}
+
+/**
  * Get some information about the formations used by entities.
  * The entities must have a UnitAI component.
  */
@@ -1660,12 +1679,20 @@
 
 /**
  * Check if player can control this entity
- * returns: true if the entity is valid and owned by the player
- *          or control all units is activated, else false
+ * @param {number} entity - The ID of the entity.
+ * @param {number} player - The ID of the player.
+ * @param {boolean} controlAll - Whether the controlAll-cheat is enabled.
+ * @return {boolean} - Whether the entity can be controlled.
  */
 function CanControlUnit(entity, player, controlAll)
 {
-	return IsOwnedByPlayer(player, entity) || controlAll;
+	let cmpUnitAI = Engine.QueryInterface(entity, IID_UnitAI);
+	let CanBeControlled = IsOwnedByPlayer(player, entity) &&
+		(cmpUnitAI && cmpUnitAI.IsControllable() || !cmpUnitAI) ||
+		controlAll;
+	if (!CanBeControlled)
+		notifyOrderFailure(entity, player);
+	return CanBeControlled;
 }
 
 /**
Index: binaries/data/mods/public/simulation/templates/template_bird.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_bird.xml
+++ binaries/data/mods/public/simulation/templates/template_bird.xml
@@ -26,6 +26,7 @@
     <FormationController>false</FormationController>
     <CanGuard>false</CanGuard>
     <CanPatrol>false</CanPatrol>
+    <Controllable>false</Controllable>
     <RoamDistance>1000.0</RoamDistance>
     <FleeDistance>10.0</FleeDistance>
     <RoamTimeMin>10000</RoamTimeMin>
Index: binaries/data/mods/public/simulation/templates/template_formation.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_formation.xml
+++ binaries/data/mods/public/simulation/templates/template_formation.xml
@@ -64,6 +64,7 @@
     <FleeDistance>12.0</FleeDistance>
     <CanGuard>true</CanGuard>
     <CanPatrol>true</CanPatrol>
+    <Controllable>true</Controllable>
   </UnitAI>
   <UnitMotion>
     <FormationController>true</FormationController>
Index: binaries/data/mods/public/simulation/templates/template_unit.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_unit.xml
+++ binaries/data/mods/public/simulation/templates/template_unit.xml
@@ -119,6 +119,7 @@
     <FormationController>false</FormationController>
     <CanGuard>true</CanGuard>
     <CanPatrol>true</CanPatrol>
+    <Controllable>true</Controllable>
   </UnitAI>
   <UnitMotion>
     <FormationController>false</FormationController>