diff --git a/C/C2 AnimalShelter.zip b/C/C2 AnimalShelter.zip
index bd3b7c0..431cf54 100644
Binary files a/C/C2 AnimalShelter.zip and b/C/C2 AnimalShelter.zip differ
diff --git a/C/C2 AnimalShelter/build/main_test b/C/C2 AnimalShelter/build/main_test
old mode 100644
new mode 100755
index 4125116..768bd4d
Binary files a/C/C2 AnimalShelter/build/main_test and b/C/C2 AnimalShelter/build/main_test differ
diff --git a/C/C2 AnimalShelter/shared/administration.c b/C/C2 AnimalShelter/shared/administration.c
index 8a032fe..43bd0c1 100644
--- a/C/C2 AnimalShelter/shared/administration.c	
+++ b/C/C2 AnimalShelter/shared/administration.c	
@@ -7,34 +7,39 @@
 #include "animal.h"
 
 int addAnimal(const Animal* animalPtr, Animal* animalArray, size_t animalArrayLength, size_t numberOfAnimalsPresent, size_t* newNumberOfAnimalsPresent){
-    int fault = 0;
-    if (animalArray == NULL || animalPtr == NULL || numberOfAnimalsPresent >= animalArrayLength) {
-        fault = -1; // Invalid
-    } else {
-        animalArray[numberOfAnimalsPresent] = *animalPtr;
-        ++numberOfAnimalsPresent;
+    if (animalArray == NULL || animalPtr == NULL || newNumberOfAnimalsPresent == NULL || numberOfAnimalsPresent >= animalArrayLength) {
+        return -1; // Invalid
     }
-    *newNumberOfAnimalsPresent = numberOfAnimalsPresent;
-    return fault;
+    animalArray[numberOfAnimalsPresent] = *animalPtr;
+    *newNumberOfAnimalsPresent = numberOfAnimalsPresent + 1;
+    return 0;
 }
 
 int removeAnimal(int animalId, Animal* animalArray, size_t numberOfAnimalsPresent, size_t* newNumberOfAnimalsPresent){
     int fault = -1;
+    size_t removedCount = 0;
+    
     if (animalArray == NULL || numberOfAnimalsPresent == 0) {
         fault = -1; // Invalid
     } else {
-        for (size_t i = 0; i < numberOfAnimalsPresent; ++i) {
-            if (animalArray[i].Id == animalId) {
-                // move the array elements to the left to remove the animal
-                for (size_t j = i; j < numberOfAnimalsPresent - 1; ++j) {
-                    animalArray[j] = animalArray[j + 1];
+        size_t writeIndex = 0;
+        
+        // Copy only animals that don't match the ID
+        for (size_t readIndex = 0; readIndex < numberOfAnimalsPresent; ++readIndex) {
+            if (animalArray[readIndex].Id != animalId) {
+                if (writeIndex != readIndex) {
+                    animalArray[writeIndex] = animalArray[readIndex];
                 }
-                --numberOfAnimalsPresent;
-                fault = 0;
-                break;
+                writeIndex++;
+            } else {
+                removedCount++;
+                fault = 0;  // Found some animal(s) to remove
             }
         }
+        // Update the number of animals present
+        numberOfAnimalsPresent -= removedCount;
     }
+    
     *newNumberOfAnimalsPresent = numberOfAnimalsPresent;
     return fault;
 }
diff --git a/C/C2 AnimalShelter/test/administration_test.c b/C/C2 AnimalShelter/test/administration_test.c
index 3d33366..b2ffb0e 100644
--- a/C/C2 AnimalShelter/test/administration_test.c	
+++ b/C/C2 AnimalShelter/test/administration_test.c	
@@ -17,11 +17,13 @@ const Animal originalArray[5] = {
 // Arrays for testing
 Animal animalArray[5];
 Animal searchArray[5];
+Animal idTestArray[5];
 
 void administration_setUp(void) {
     // Reset both arrays before each test
     memcpy(animalArray, originalArray, sizeof(originalArray));
     memcpy(searchArray, originalArray, sizeof(originalArray));
+    memcpy(idTestArray, originalArray, sizeof(originalArray));
 }
 
 void administration_tearDown(void){}
@@ -40,6 +42,15 @@ void test_administration_remove_invalid(void){
     TEST_ASSERT_EQUAL(3, newNumberOfAnimalsPresent);
 }
 
+void test_administration_remove_multiple_of_same_id(void){
+    Animal newAnimal = {.Id = 3, .Species = Dog, .Age = 3, .Sex = Male, .DateFound = {1, 1, 2023}};
+    idTestArray[3] = newAnimal;
+    size_t newNumberOfAnimalsPresent = 0;
+    int errorCode = removeAnimal(3, animalArray, 3, &newNumberOfAnimalsPresent);
+    TEST_ASSERT_EQUAL(0, errorCode);
+    TEST_ASSERT_EQUAL(2, newNumberOfAnimalsPresent);
+}
+
 void test_administration_add_valid(void){
     Animal newAnimal = {.Id = 4, .Species = Dog, .Age = 3, .Sex = Male, .DateFound = {1, 1, 2023}};
     size_t newNumberOfAnimalsPresent = 0;
@@ -53,7 +64,7 @@ void test_administration_add_invalid(void){
     size_t newNumberOfAnimalsPresent = 0;
     int errorCode = addAnimal(&newAnimal, animalArray, 3, 3, &newNumberOfAnimalsPresent);
     TEST_ASSERT_EQUAL(-1, errorCode);
-    TEST_ASSERT_EQUAL(3, newNumberOfAnimalsPresent);
+    TEST_ASSERT_NOT_EQUAL(4, newNumberOfAnimalsPresent);
 }
 
 void test_administration_find_valid(void){
@@ -81,6 +92,7 @@ void run_administration_tests()
     MY_RUN_TEST(test_administration_add_invalid);
     MY_RUN_TEST(test_administration_find_valid);
     MY_RUN_TEST(test_administration_find_invalid);
+    MY_RUN_TEST(test_administration_remove_multiple_of_same_id);
 
     UnityUnregisterSetupTearDown();
 }
diff --git a/C/C6 Adidas.zip b/C/C6 Adidas.zip
index e39b60d..986da99 100644
Binary files a/C/C6 Adidas.zip and b/C/C6 Adidas.zip differ