diff --git a/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.Designer.cs b/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.Designer.cs
new file mode 100644
index 0000000..4d61ec0
--- /dev/null
+++ b/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.Designer.cs
@@ -0,0 +1,134 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    [DbContext(typeof(ApplicationContext))]
+    [Migration("20260605213640_InitialCreate")]
+    partial class InitialCreate
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Breeder", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Breeders", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Gerbil", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("BreederId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Gender")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Guid?>("LitterId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BreederId");
+
+                    b.HasIndex("LitterId");
+
+                    b.ToTable("Gerbils", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Litter", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid?>("FatherId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("MotherId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("Strength")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FatherId");
+
+                    b.HasIndex("MotherId");
+
+                    b.ToTable("Litters", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Gerbil", b =>
+                {
+                    b.HasOne("GerbilManagerWebAPI.Models.Breeder", "Breeder")
+                        .WithMany()
+                        .HasForeignKey("BreederId");
+
+                    b.HasOne("GerbilManagerWebAPI.Models.Litter", "Litter")
+                        .WithMany()
+                        .HasForeignKey("LitterId");
+
+                    b.Navigation("Breeder");
+
+                    b.Navigation("Litter");
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Litter", b =>
+                {
+                    b.HasOne("GerbilManagerWebAPI.Models.Gerbil", "Father")
+                        .WithMany()
+                        .HasForeignKey("FatherId");
+
+                    b.HasOne("GerbilManagerWebAPI.Models.Gerbil", "Mother")
+                        .WithMany()
+                        .HasForeignKey("MotherId");
+
+                    b.Navigation("Father");
+
+                    b.Navigation("Mother");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.cs b/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.cs
new file mode 100644
index 0000000..02c6b16
--- /dev/null
+++ b/GerbilManagerWebAPI/Migrations/20260605213640_InitialCreate.cs
@@ -0,0 +1,121 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialCreate : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Breeders",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Breeders", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Gerbils",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Gender = table.Column<string>(type: "text", nullable: false),
+                    LitterId = table.Column<Guid>(type: "uuid", nullable: true),
+                    BreederId = table.Column<Guid>(type: "uuid", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Gerbils", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Gerbils_Breeders_BreederId",
+                        column: x => x.BreederId,
+                        principalTable: "Breeders",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Litters",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "text", nullable: false),
+                    Date = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    Strength = table.Column<int>(type: "integer", nullable: true),
+                    FatherId = table.Column<Guid>(type: "uuid", nullable: true),
+                    MotherId = table.Column<Guid>(type: "uuid", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Litters", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Litters_Gerbils_FatherId",
+                        column: x => x.FatherId,
+                        principalTable: "Gerbils",
+                        principalColumn: "Id");
+                    table.ForeignKey(
+                        name: "FK_Litters_Gerbils_MotherId",
+                        column: x => x.MotherId,
+                        principalTable: "Gerbils",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Gerbils_BreederId",
+                table: "Gerbils",
+                column: "BreederId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Gerbils_LitterId",
+                table: "Gerbils",
+                column: "LitterId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Litters_FatherId",
+                table: "Litters",
+                column: "FatherId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Litters_MotherId",
+                table: "Litters",
+                column: "MotherId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Gerbils_Litters_LitterId",
+                table: "Gerbils",
+                column: "LitterId",
+                principalTable: "Litters",
+                principalColumn: "Id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Gerbils_Breeders_BreederId",
+                table: "Gerbils");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Gerbils_Litters_LitterId",
+                table: "Gerbils");
+
+            migrationBuilder.DropTable(
+                name: "Breeders");
+
+            migrationBuilder.DropTable(
+                name: "Litters");
+
+            migrationBuilder.DropTable(
+                name: "Gerbils");
+        }
+    }
+}
diff --git a/GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs b/GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs
new file mode 100644
index 0000000..95e0d3c
--- /dev/null
+++ b/GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs
@@ -0,0 +1,131 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    [DbContext(typeof(ApplicationContext))]
+    partial class ApplicationContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Breeder", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Breeders", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Gerbil", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("BreederId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Gender")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<Guid?>("LitterId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BreederId");
+
+                    b.HasIndex("LitterId");
+
+                    b.ToTable("Gerbils", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Litter", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<Guid?>("FatherId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("MotherId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int?>("Strength")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("FatherId");
+
+                    b.HasIndex("MotherId");
+
+                    b.ToTable("Litters", (string)null);
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Gerbil", b =>
+                {
+                    b.HasOne("GerbilManagerWebAPI.Models.Breeder", "Breeder")
+                        .WithMany()
+                        .HasForeignKey("BreederId");
+
+                    b.HasOne("GerbilManagerWebAPI.Models.Litter", "Litter")
+                        .WithMany()
+                        .HasForeignKey("LitterId");
+
+                    b.Navigation("Breeder");
+
+                    b.Navigation("Litter");
+                });
+
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Litter", b =>
+                {
+                    b.HasOne("GerbilManagerWebAPI.Models.Gerbil", "Father")
+                        .WithMany()
+                        .HasForeignKey("FatherId");
+
+                    b.HasOne("GerbilManagerWebAPI.Models.Gerbil", "Mother")
+                        .WithMany()
+                        .HasForeignKey("MotherId");
+
+                    b.Navigation("Father");
+
+                    b.Navigation("Mother");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}