diff --git a/src/app/dto/adopt.dto.go b/src/app/dto/adopt.dto.go
index 5cf4ad2..56ecaef 100644
--- a/src/app/dto/adopt.dto.go
+++ b/src/app/dto/adopt.dto.go
@@ -11,5 +11,5 @@ type AdoptByRequest struct {
 }
 
 type AdoptByResponse struct {
-	Success bool `json:"success" validate:"required"`
+	Success bool `json:"success"`
 }
diff --git a/src/app/service/pet/pet.service.go b/src/app/service/pet/pet.service.go
index 8cc0401..4362e19 100644
--- a/src/app/service/pet/pet.service.go
+++ b/src/app/service/pet/pet.service.go
@@ -280,7 +280,6 @@ func (s *Service) Adopt(petId string, in *dto.AdoptByRequest) (result *dto.Adopt
 		UserId: in.UserID,
 		PetId:  in.PetID,
 	})
-
 	if errRes != nil {
 		st, _ := status.FromError(errRes)
 		log.Error().
@@ -290,25 +289,22 @@ func (s *Service) Adopt(petId string, in *dto.AdoptByRequest) (result *dto.Adopt
 			Msg(st.Message())
 		switch st.Code() {
 		case codes.NotFound:
-			return &dto.AdoptByResponse{
-					Success: false,
-				}, &dto.ResponseErr{
+			return nil,
+				&dto.ResponseErr{
 					StatusCode: http.StatusNotFound,
 					Message:    constant.PetNotFoundMessage,
 					Data:       nil,
 				}
 		case codes.Unavailable:
-			return &dto.AdoptByResponse{
-					Success: false,
-				}, &dto.ResponseErr{
+			return nil,
+				&dto.ResponseErr{
 					StatusCode: http.StatusServiceUnavailable,
 					Message:    constant.UnavailableServiceMessage,
 					Data:       nil,
 				}
 		default:
-			return &dto.AdoptByResponse{
-					Success: false,
-				}, &dto.ResponseErr{
+			return nil,
+				&dto.ResponseErr{
 					StatusCode: http.StatusServiceUnavailable,
 					Message:    constant.InternalErrorMessage,
 					Data:       nil,
diff --git a/src/app/service/pet/pet.service_test.go b/src/app/service/pet/pet.service_test.go
index 797af40..5705c12 100644
--- a/src/app/service/pet/pet.service_test.go
+++ b/src/app/service/pet/pet.service_test.go
@@ -539,40 +539,34 @@ func (t *PetServiceTest) TestAdoptSuccess() {
 
 func (t *PetServiceTest) TestAdoptNotFoundError() {
 	protoReq := t.AdoptReq
-	protoResp := &petproto.AdoptPetResponse{
-		Success: false,
-	}
 
 	clientErr := status.Error(codes.NotFound, constant.PetNotFoundMessage)
 
 	expected := t.NotFoundErr
 
 	client := &petmock.PetClientMock{}
-	client.On("AdoptPet", protoReq).Return(protoResp, clientErr)
+	client.On("AdoptPet", protoReq).Return(nil, clientErr)
 
 	svc := NewService(client)
 	actual, err := svc.Adopt(t.Pet.Id, t.AdoptDto)
 
-	assert.Equal(t.T(), &dto.AdoptByResponse{Success: false}, actual)
+	assert.Nil(t.T(), actual)
 	assert.Equal(t.T(), expected, err)
 }
 
 func (t *PetServiceTest) TestAdoptUnavailableServiceError() {
 	protoReq := t.AdoptReq
-	protoResp := &petproto.AdoptPetResponse{
-		Success: false,
-	}
 
 	clientErr := status.Error(codes.Unavailable, constant.UnavailableServiceMessage)
 
 	expected := t.UnavailableServiceErr
 
 	client := &petmock.PetClientMock{}
-	client.On("AdoptPet", protoReq).Return(protoResp, clientErr)
+	client.On("AdoptPet", protoReq).Return(nil, clientErr)
 
 	svc := NewService(client)
 	actual, err := svc.Adopt(t.Pet.Id, t.AdoptDto)
 
-	assert.Equal(t.T(), &dto.AdoptByResponse{Success: false}, actual)
+	assert.Nil(t.T(), actual)
 	assert.Equal(t.T(), expected, err)
 }