diff --git a/Sources/Model/Animal.cs b/Sources/Model/Animal.cs
index e80817e..246b500 100644
--- a/Sources/Model/Animal.cs
+++ b/Sources/Model/Animal.cs
@@ -44,7 +44,7 @@ namespace Model
         private bool nomIsValid;
 
         [DataMember(Name = "naissance")]
-        public string DateNaissance
+        public DateTime DateNaissance
         {
             get => dateNaissance;
             set
@@ -55,7 +55,7 @@ namespace Model
                 OnPropertyChanged(nameof(DateNaissance));
             }
         }
-        private string dateNaissance;
+        private DateTime dateNaissance;
 
         [DataMember(Name = "sexe")]
         public string Sexe 
@@ -71,7 +71,7 @@ namespace Model
         private string sexe;
 
         [DataMember(Name = "adoption")]
-        public string DateAdoption
+        public DateTime DateAdoption
         {
             get => dateAdoption;
             set
@@ -82,7 +82,7 @@ namespace Model
                 OnPropertyChanged(nameof(DateAdoption));
             }
         }
-        private string dateAdoption;
+        private DateTime dateAdoption;
 
         [DataMember(Name = "taille")]
         public float? Taille
@@ -238,12 +238,10 @@ namespace Model
         }
         private string image;
 
-        public Animal(string nom = "", string dateNaissance = "Inconnue", string sexe = "Inconnu", string dateAdpotion = "Inconnue", float? taille = null, float? poids = null, string alimentation = "Inconnue")
+        public Animal(string nom = "", string sexe = "Inconnu", float? taille = null, float? poids = null, string alimentation = "Inconnue")
         {
             Nom = nom;
-            DateNaissance = dateNaissance;
             Sexe = sexe;
-            DateAdoption = dateAdpotion;
             Taille = taille;
             Poids = poids;
             Alimentation = alimentation;
diff --git a/Sources/Persistance/DataSerializer.cs b/Sources/Persistance/DataSerializer.cs
index cd3216f..3e7195c 100644
--- a/Sources/Persistance/DataSerializer.cs
+++ b/Sources/Persistance/DataSerializer.cs
@@ -12,11 +12,11 @@ namespace Persistance
 {
     public class DataSerializer
     {
-        public void Serializer() 
+        public static void Serializer(String path) 
         {
             Theque theque = new Theque();
 
-            Directory.SetCurrentDirectory(Path.Combine(Directory.GetCurrentDirectory()));
+            Directory.SetCurrentDirectory(Path.Combine(Directory.GetCurrentDirectory(), path));
             string xmlFile = "theque.xml";
 
             var serializer = new DataContractSerializer(typeof(Theque));
@@ -27,20 +27,25 @@ namespace Persistance
             }
         }
 
-        public Theque Deserializer()
+        public static Theque Deserializer(String path)
         {
-            string path = FileSystem.
-            Directory.SetCurrentDirectory();
+            Directory.SetCurrentDirectory(Path.Combine(Directory.GetCurrentDirectory()));
             string xmlFile = "theque.xml";
 
             var serializer = new DataContractSerializer(typeof(Theque));
 
             Theque theque = new Theque();
-            using (Stream s = File.OpenRead(xmlFile))
+            if(File.Exists(xmlFile))
+            {
+                using (Stream s = File.OpenRead(xmlFile))
+                {
+                    theque = serializer.ReadObject(s) as Theque;
+                }
+            }
+            else
             {
-                theque = serializer.ReadObject(s) as Theque;
+                theque = Stub.LoadTheque();
             }
-            
             return theque;
         }
     }
diff --git a/Sources/Views/App.xaml.cs b/Sources/Views/App.xaml.cs
index abc4431..ad2c0f1 100644
--- a/Sources/Views/App.xaml.cs
+++ b/Sources/Views/App.xaml.cs
@@ -1,4 +1,5 @@
 using Model;
+using Persistance;
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
 
@@ -6,8 +7,9 @@ namespace Views
 {
     public partial class App : Application, INotifyPropertyChanged
     {
-        string path = FileSystem.Current.AppDataDirectory;
-        public Theque Theque { get; set; } = Stub.LoadTheque();
+        public string SerializationPath = FileSystem.Current.AppDataDirectory;
+        static private string serializationPath = FileSystem.Current.AppDataDirectory;
+        public Theque Theque { get; set; } = DataSerializer.Deserializer(serializationPath);
         public Animal AnimalSelectionner
         {
             get => animalSelectionner;
@@ -17,8 +19,9 @@ namespace Views
                 OnPropertyChanged(nameof(AnimalSelectionner));
             }
         }
-        public New_DetailAnimal PageDeSaisie { get; set; }
         private Animal animalSelectionner;
+
+        public New_DetailAnimal PageDeSaisie { get; set; }
         public Espece EspeceSelectionner { get; set; }
         public Race RaceSelectionner { get; set; }
 
diff --git a/Sources/Views/New_DetailAnimal.xaml b/Sources/Views/New_DetailAnimal.xaml
index b15af7b..5f803db 100644
--- a/Sources/Views/New_DetailAnimal.xaml
+++ b/Sources/Views/New_DetailAnimal.xaml
@@ -54,9 +54,10 @@
                           RowSpacing="8">
                     <Label FontAttributes="Bold"
                                Text="Date de naissance"/>
-                    <Entry Grid.Column="1"
-                               HorizontalOptions="End"
-                               Text="{Binding DateNaissance}"/>
+                    <DatePicker Grid.Column="1"
+                                MinimumDate="01/01/2000"
+                                HorizontalOptions="End"
+                                Date="{Binding DateNaissance}"/>
                     <Label Grid.Row="1"
                                FontAttributes="Bold"
                                Text="Sexe"/>
@@ -67,10 +68,11 @@
                     <Label Grid.Row="2"
                                FontAttributes="Bold"
                                Text="Date d'adoption"/>
-                    <Entry Grid.Column="1"
-                               Grid.Row="2"
-                               HorizontalOptions="End"
-                               Text="{Binding DateAdoption}"/>
+                    <DatePicker Grid.Column="1"
+                                Grid.Row="2"
+                                MinimumDate="01/01/2000"
+                                HorizontalOptions="End"
+                                Date="{Binding DateAdoption}"/>
                     <Label Grid.Row="3"
                                FontAttributes="Bold"
                                Text="Taille"/>
diff --git a/Sources/Views/New_DetailAnimal.xaml.cs b/Sources/Views/New_DetailAnimal.xaml.cs
index 122056c..7e2f62c 100644
--- a/Sources/Views/New_DetailAnimal.xaml.cs
+++ b/Sources/Views/New_DetailAnimal.xaml.cs
@@ -1,67 +1,69 @@
-using Model;
+using Model;
+using Persistance;
 using System.Dynamic;
 
-namespace Views;
-
-public partial class New_DetailAnimal : ContentPage
-{
-    private Animal AnimalSelectione => (App.Current as App).AnimalSelectionner;
-
-	public New_DetailAnimal()
-	{
-		InitializeComponent();
-        (App.Current as App).PageDeSaisie = this;
-        InitBinding();
-    }
-
+namespace Views;
+
+public partial class New_DetailAnimal : ContentPage
+{
+    private Animal AnimalSelectione => (App.Current as App).AnimalSelectionner;
+
+	public New_DetailAnimal()
+	{
+		InitializeComponent();
+        (App.Current as App).PageDeSaisie = this;
+        InitBinding();
+    }
+
     public void InitBinding()
     {
-        BindingContext = AnimalSelectione;
+        BindingContext = AnimalSelectione;
         Picker_especes.BindingContext = (App.Current as App).Theque;
-    }
-
-    public async void Button_OnClick(object sender, EventArgs e)
-    {
-        (App.Current as App).Theque.SupprimerAnimal((App.Current as App).AnimalSelectionner);
-        await Shell.Current.GoToAsync("//Animaux");
-    }
-
-    public async void Validate_OnClick(object sender, EventArgs e)
-    {
+    }
+
+    public async void Button_OnClick(object sender, EventArgs e)
+    {
+        (App.Current as App).Theque.SupprimerAnimal((App.Current as App).AnimalSelectionner);
+        await Shell.Current.GoToAsync("//Animaux");
+    }
+
+    public async void Validate_OnClick(object sender, EventArgs e)
+    {
         if ((App.Current as App).AnimalSelectionner.NomIsValid == true)
         {
             await Shell.Current.GoToAsync("//Animaux");
-        }
-    }
-
-    private void EspeceClic(object sender, EventArgs e)
-    {
-        (App.Current as App).AnimalSelectionner.Espece = (sender as Picker).SelectedItem as Espece;
-        (App.Current as App).AnimalSelectionner.Race = null;
-    }
-
-    private void RaceClic(object sender, EventArgs e)
-    {
-        (App.Current as App).AnimalSelectionner.Race = (sender as Picker).SelectedItem as Race;
-    }
-
-    public async void TakePhoto(object sender, EventArgs e)
-    {
-        if (MediaPicker.Default.IsCaptureSupported)
-        {
-            FileResult photo = await MediaPicker.Default.PickPhotoAsync();
-
-            if (photo != null)
-            {
-                string localFilePath = Path.Combine(FileSystem.AppDataDirectory, photo.FileName);
-
-                using Stream sourceStream = await photo.OpenReadAsync();
-                using FileStream localFileStream = File.OpenWrite(localFilePath);
-
-                await sourceStream.CopyToAsync(localFileStream);
-
-                (App.Current as App).AnimalSelectionner.Image = Path.Combine(FileSystem.AppDataDirectory, photo.FileName);
-            }
-        }
-    }
+            DataSerializer.Serializer((App.Current as App).SerializationPath);
+        }
+    }
+
+    private void EspeceClic(object sender, EventArgs e)
+    {
+        (App.Current as App).AnimalSelectionner.Espece = (sender as Picker).SelectedItem as Espece;
+        (App.Current as App).AnimalSelectionner.Race = null;
+    }
+
+    private void RaceClic(object sender, EventArgs e)
+    {
+        (App.Current as App).AnimalSelectionner.Race = (sender as Picker).SelectedItem as Race;
+    }
+
+    public async void TakePhoto(object sender, EventArgs e)
+    {
+        if (MediaPicker.Default.IsCaptureSupported)
+        {
+            FileResult photo = await MediaPicker.Default.PickPhotoAsync();
+
+            if (photo != null)
+            {
+                string localFilePath = Path.Combine(FileSystem.AppDataDirectory, photo.FileName);
+
+                using Stream sourceStream = await photo.OpenReadAsync();
+                using FileStream localFileStream = File.OpenWrite(localFilePath);
+
+                await sourceStream.CopyToAsync(localFileStream);
+
+                (App.Current as App).AnimalSelectionner.Image = Path.Combine(FileSystem.AppDataDirectory, photo.FileName);
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/Sources/Views/Views.csproj b/Sources/Views/Views.csproj
index 605d914..f033b9d 100644
--- a/Sources/Views/Views.csproj
+++ b/Sources/Views/Views.csproj
@@ -55,6 +55,7 @@
 
 	<ItemGroup>
 	  <ProjectReference Include="..\Model\Model.csproj" />
+	  <ProjectReference Include="..\Persistance\Persistance.csproj" />
 	</ItemGroup>
 
 	<ItemGroup>