diff --git a/class/animal.php b/class/animal.php
index 09c69d585777d0a45839d5b9b21bbad6c57fed49..7aa633b4b2f8bdece99b7088eefee849b13d6d4b 100644
--- a/class/animal.php
+++ b/class/animal.php
@@ -13,6 +13,10 @@ class Animal extends Objet
     protected $date_deces;
     protected $taille;
     protected $code;
+    public $_specialFields = array(
+        "sterile" => array(
+            "t" => "BoolField"
+        ));
 
     public function id()
     {
diff --git a/class/produit.php b/class/produit.php
index caecb2db63ecfec926f11e2334e0700ed68932c8..9b55e85c4abfb8a4ca3ee5531602574631e60c4c 100644
--- a/class/produit.php
+++ b/class/produit.php
@@ -6,6 +6,10 @@ class Produit extends Objet
     protected $nom;
     protected $prix;
     protected $is_medicament;
+    public $_specialFields = array(
+        "is_medicament" => array(
+            "t" => "BoolField"
+        ));
     
     public function id()
     {