diff --git a/Controllers/GerbilsController.cs b/Controllers/GerbilsController.cs
index a659119..33813e6 100644
--- a/Controllers/GerbilsController.cs
+++ b/Controllers/GerbilsController.cs
@@ -1,6 +1,9 @@
 using GerbilManager.Models;
 using GerbilManager.Repositories;
+using GerbilManager.Dtos;
+
 using Microsoft.AspNetCore.Mvc;
+using GerbilManager.Converter;
 
 namespace GerbilManager.Controllers
 {
@@ -17,17 +20,17 @@ namespace GerbilManager.Controllers
 
         //GET /gerbils
         [HttpGet]
-        public IEnumerable<Gerbil> GetGerbils()
+        public IEnumerable<GerbilDto> GetGerbils()
         {
-            var items = repository.GetGerbils();
+            var items = repository.GetGerbils().Select( gerbil => gerbil.AsDto());
             return items;
         }
 
         //GET /gerbils
         [HttpGet("{id}")]
-        public ActionResult<Gerbil> GetGerbil(Guid id)
+        public ActionResult<GerbilDto> GetGerbil(Guid id)
         {
-            var item = repository.GetGerbil(id);
+            var item = repository.GetGerbil(id).AsDto();
 
             if(item is null)
             {
diff --git a/Converter/BreederConveter.cs b/Converter/BreederConveter.cs
new file mode 100644
index 0000000..5b8f936
--- /dev/null
+++ b/Converter/BreederConveter.cs
@@ -0,0 +1,17 @@
+using GerbilManager.Dtos;
+using GerbilManager.Models;
+
+namespace GerbilManager.Converter
+{
+    public static class BreederConverterExtension
+    {
+        public static BreederDto AsDto(this Breeder breeder)
+        {
+            return new BreederDto{
+                Id = breeder.Id,
+                Name = breeder.Name
+            };
+        } 
+    }
+}
+
diff --git a/Converter/GerbilConverter.cs b/Converter/GerbilConverter.cs
new file mode 100644
index 0000000..79f2f35
--- /dev/null
+++ b/Converter/GerbilConverter.cs
@@ -0,0 +1,19 @@
+using GerbilManager.Dtos;
+using GerbilManager.Models;
+
+namespace GerbilManager.Converter
+{
+    public static class GerbilConverterExtension
+    {
+        public static GerbilDto AsDto(this Gerbil gerbil)
+        {
+            return new GerbilDto{
+                Breeder = gerbil.Breeder.AsDto(),
+                Gender = (GenderDto) ((int) gerbil.Gender),
+                Name = gerbil.Name,
+                Litter = gerbil.Litter.AsDto()
+            };
+        }
+    }
+}
+
diff --git a/Converter/LitterConverter.cs b/Converter/LitterConverter.cs
new file mode 100644
index 0000000..0461851
--- /dev/null
+++ b/Converter/LitterConverter.cs
@@ -0,0 +1,21 @@
+using GerbilManager.Dtos;
+using GerbilManager.Models;
+
+namespace GerbilManager.Converter
+{
+    public static class LitterConverterExtension
+    {
+        public static LitterDto AsDto(this Litter litter)
+        {
+            return new LitterDto{
+                Id = litter.Id,
+                Date = litter.Date,
+                Father = litter.Father.AsDto(),
+                Mother = litter.Mother.AsDto(),
+                Name = litter.Name,
+                Strength = litter.Strength
+            };
+        }
+    }
+}
+
diff --git a/Dtos/BreederDto.cs b/Dtos/BreederDto.cs
new file mode 100644
index 0000000..969b381
--- /dev/null
+++ b/Dtos/BreederDto.cs
@@ -0,0 +1,8 @@
+namespace GerbilManager.Dtos
+{
+        public record BreederDto
+    {
+        public Guid Id { get; init; }
+        public string Name { get; init; }
+    }
+}
\ No newline at end of file
diff --git a/Dtos/GenderDto.cs b/Dtos/GenderDto.cs
new file mode 100644
index 0000000..28e3dea
--- /dev/null
+++ b/Dtos/GenderDto.cs
@@ -0,0 +1,9 @@
+namespace GerbilManager.Dtos
+{
+    public enum GenderDto
+    {
+        unknown = 0,
+        male = 1,
+        female = 2
+    }
+}
\ No newline at end of file
diff --git a/Dtos/GerbilDto.cs b/Dtos/GerbilDto.cs
new file mode 100644
index 0000000..ef8ad8a
--- /dev/null
+++ b/Dtos/GerbilDto.cs
@@ -0,0 +1,11 @@
+namespace GerbilManager.Dtos
+{
+    public record GerbilDto
+    {
+        public Guid Id { get; init; }
+        public string Name { get; init; }
+        public GenderDto Gender { get; init; }
+        public LitterDto Litter { get; init; }
+        public BreederDto Breeder { get; init; }
+    }
+}
\ No newline at end of file
diff --git a/Dtos/LitterDto.cs b/Dtos/LitterDto.cs
new file mode 100644
index 0000000..8b8a84a
--- /dev/null
+++ b/Dtos/LitterDto.cs
@@ -0,0 +1,12 @@
+namespace GerbilManager.Dtos
+{
+    public record LitterDto
+    {
+        public Guid Id { get; init; }
+        public string Name { get; init; }
+        public DateTime Date { get; init; }
+        public int Strength { get; init; }
+        public GerbilDto Father { get; init; }
+        public GerbilDto Mother { get; init; }
+    }
+}
\ No newline at end of file
diff --git a/Models/Gender.cs b/Models/Gender.cs
index 590ef4f..bcad74b 100644
--- a/Models/Gender.cs
+++ b/Models/Gender.cs
@@ -2,8 +2,8 @@ namespace GerbilManager.Models
 {
     public enum Gender
     {
-        unknown,
-        male,
-        female
+        unknown = 0,
+        male = 1,
+        female = 2
     }
 }
\ No newline at end of file