diff --git a/Controllers/GerbilsController.cs b/Controllers/GerbilsController.cs
index 33813e6..505e82d 100644
--- a/Controllers/GerbilsController.cs
+++ b/Controllers/GerbilsController.cs
@@ -12,6 +12,8 @@ namespace GerbilManager.Controllers
     public class GerbilsController : ControllerBase
     {
         private readonly IGerbilRepository repository;
+        private readonly IBreederRepository breederRepository;
+        private readonly ILitterRepository litterRepository;
 
         public GerbilsController(IGerbilRepository repo)
         {
@@ -38,5 +40,56 @@ namespace GerbilManager.Controllers
             }
             return item;
         }
+
+        [HttpPost()]
+        public ActionResult<GerbilDto> CreateGerbil(CreateGerbilDto dto)
+        {
+            Gerbil gerbil = new Gerbil{
+                Id = Guid.NewGuid(),
+                Name = dto.Name,
+                Breeder = breederRepository.GetBreeder(dto.Breeder),
+                Litter = litterRepository.GetLitter(dto.Litter),
+                Gender = (Gender) (int) dto.Gender
+            };
+
+            this.repository.CreateGerbil(gerbil);
+
+            return CreatedAtAction(nameof(GetGerbil), new { id = gerbil.Id}, gerbil.AsDto());
+        }
+
+        [HttpPut("{id}")]
+        public ActionResult UpdateGerbil(Guid id, UpdateGerbilDto gerbilDto)
+        {
+            var existingItem = repository.GetGerbil(id);
+            if(existingItem is null)
+            {
+                return NotFound();
+            }
+
+            Gerbil updatedGerbil = existingItem with{
+                Breeder = breederRepository.GetBreeder(gerbilDto.Breeder.Id),
+                Litter = litterRepository.GetLitter(gerbilDto.Litter.Id),
+                Gender = (Gender) (int) gerbilDto.Gender,
+                Name = gerbilDto.Name
+            };
+
+            repository.UpdateGerbil(updatedGerbil);
+            return NoContent();
+        }
+
+        [HttpDelete("{id}")]
+        public ActionResult DeleteItem(Guid id)
+        {
+            var existingGerbil = repository.GetGerbil(id);
+
+            if(existingGerbil is null)
+            {
+                return NotFound();
+            }
+
+            repository.DeleteGerbil(existingGerbil);
+
+            return NoContent();
+        }
     }
 }
\ No newline at end of file
diff --git a/Converter/BreederConveter.cs b/Converter/BreederConveter.cs
index 5b8f936..25aea18 100644
--- a/Converter/BreederConveter.cs
+++ b/Converter/BreederConveter.cs
@@ -11,7 +11,8 @@ namespace GerbilManager.Converter
                 Id = breeder.Id,
                 Name = breeder.Name
             };
-        } 
+        }
+
     }
 }
 
diff --git a/Dtos/CreateBreederDto.cs b/Dtos/CreateBreederDto.cs
new file mode 100644
index 0000000..a4616ae
--- /dev/null
+++ b/Dtos/CreateBreederDto.cs
@@ -0,0 +1,7 @@
+namespace GerbilManager.Dtos
+{
+    public record CreateBreederDto
+    {
+        public string Name { get; init; }
+    }
+}
\ No newline at end of file
diff --git a/Dtos/CreateGerbilDto.cs b/Dtos/CreateGerbilDto.cs
new file mode 100644
index 0000000..8654756
--- /dev/null
+++ b/Dtos/CreateGerbilDto.cs
@@ -0,0 +1,11 @@
+namespace GerbilManager.Dtos
+{
+    public record CreateGerbilDto
+    {
+        public string Name { get; init; }
+        public GenderDto Gender { get; init; }
+        public Guid Litter { get; init; }
+        public Guid Breeder { get; init; }
+    }
+    
+}
\ No newline at end of file
diff --git a/Dtos/CreateLitterDto.cs b/Dtos/CreateLitterDto.cs
new file mode 100644
index 0000000..4465aa7
--- /dev/null
+++ b/Dtos/CreateLitterDto.cs
@@ -0,0 +1,11 @@
+namespace GerbilManager.Dtos
+{
+        public record CreateLitterDto
+    {
+        public string Name { get; init; }
+        public DateTime Date { get; init; }
+        public int Strength { get; init; }
+        public Guid Father { get; init; }
+        public Guid Mother { get; init; }
+    }
+}
\ No newline at end of file
diff --git a/Dtos/UpdateGerbilDto.cs b/Dtos/UpdateGerbilDto.cs
new file mode 100644
index 0000000..8d68301
--- /dev/null
+++ b/Dtos/UpdateGerbilDto.cs
@@ -0,0 +1,10 @@
+namespace GerbilManager.Dtos
+{
+    public record UpdateGerbilDto
+    {
+        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/Repositories/IBreederRepository.cs b/Repositories/IBreederRepository.cs
new file mode 100644
index 0000000..c3d068d
--- /dev/null
+++ b/Repositories/IBreederRepository.cs
@@ -0,0 +1,13 @@
+using GerbilManager.Models;
+
+namespace GerbilManager.Repositories
+{
+    public interface IBreederRepository
+    {
+        IEnumerable<Breeder> GetBreeders();
+
+        Breeder GetBreeder(Guid id);
+
+        void CreateBreeder(Breeder breeder);
+    }
+}
\ No newline at end of file
diff --git a/Repositories/IGerbilRepository.cs b/Repositories/IGerbilRepository.cs
index 3ede4c7..320d09c 100644
--- a/Repositories/IGerbilRepository.cs
+++ b/Repositories/IGerbilRepository.cs
@@ -7,5 +7,11 @@ namespace GerbilManager.Repositories
         IEnumerable<Gerbil> GetGerbils();
 
         Gerbil GetGerbil(Guid id);
+
+        void CreateGerbil(Gerbil gerbil);
+
+        void UpdateGerbil(Gerbil gerbil);
+
+        void DeleteGerbil(Gerbil gerilb);
     }
 }
\ No newline at end of file
diff --git a/Repositories/ILitterRepostitory.cs b/Repositories/ILitterRepostitory.cs
new file mode 100644
index 0000000..6f30331
--- /dev/null
+++ b/Repositories/ILitterRepostitory.cs
@@ -0,0 +1,13 @@
+using GerbilManager.Models;
+
+namespace GerbilManager.Repositories
+{
+    public interface ILitterRepository
+    {
+        IEnumerable<Litter> GetLitters();
+
+        Litter GetLitter(Guid id);
+
+        void CreateLitter(Litter breeder);
+    }
+}
\ No newline at end of file
diff --git a/Repositories/InMemGerbilRepository.cs b/Repositories/InMemGerbilRepository.cs
index fd2ebbf..d55bc5c 100644
--- a/Repositories/InMemGerbilRepository.cs
+++ b/Repositories/InMemGerbilRepository.cs
@@ -17,6 +17,23 @@ namespace GerbilManager.Repositories
         }
 
         public Gerbil GetGerbil(Guid id) => _gerbilList.SingleOrDefault(x => x.Id == id);
+
+        public void CreateGerbil(Gerbil gerbil)
+        {
+            _gerbilList.Add(gerbil);
+        }
+
+        public void UpdateGerbil(Gerbil gerbil)
+        {
+            var index = this._gerbilList.FindIndex(existingGerbil => existingGerbil.Id == gerbil.Id);
+            _gerbilList[index] = gerbil;
+        }
+
+        public void DeleteGerbil(Gerbil gerbil)
+        {
+            var index = this._gerbilList.FindIndex(existingGerbil => existingGerbil.Id == gerbil.Id);
+            _gerbilList.RemoveAt(index);
+        }
     }
 
 }