diff --git a/cpp04/ex01/Brain.cpp b/cpp04/ex01/Brain.cpp
index dd24df0..3ed559c 100644
--- a/cpp04/ex01/Brain.cpp
+++ b/cpp04/ex01/Brain.cpp
@@ -6,7 +6,7 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/02/06 15:17:41 by rparodi           #+#    #+#             */
-/*   Updated: 2025/02/06 23:28:28 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/02/07 17:51:50 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -25,3 +25,7 @@ Brain::Brain() {
 Brain::~Brain() {
 
 }
+
+Brain& Brain::operator=(Brain &value) {
+	return (value);
+}
diff --git a/cpp04/ex01/Brain.hpp b/cpp04/ex01/Brain.hpp
index 2d0237e..3e7e09a 100644
--- a/cpp04/ex01/Brain.hpp
+++ b/cpp04/ex01/Brain.hpp
@@ -6,7 +6,7 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/02/06 15:17:49 by rparodi           #+#    #+#             */
-/*   Updated: 2025/02/06 17:35:51 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/02/07 17:51:43 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,11 +14,13 @@
 #define BRAIN_HPP
 
 #include <string>
+
 class Brain {
 	public:
 		Brain();
 		~Brain();
 		std::string idea[100];
+		Brain& operator=(Brain &value);
 
 	protected:
 
diff --git a/cpp04/ex01/Dog.cpp b/cpp04/ex01/Dog.cpp
index 7b8c767..12e0083 100644
--- a/cpp04/ex01/Dog.cpp
+++ b/cpp04/ex01/Dog.cpp
@@ -6,15 +6,17 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/01/30 13:40:30 by rparodi           #+#    #+#             */
-/*   Updated: 2025/01/31 19:53:02 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/02/07 16:04:29 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "Dog.hpp"
+#include "Brain.hpp"
 
 Dog::Dog() {
 	std::cout << "[Dog]\t\tCreating the class" << std::endl;
 	type = "Dog";
+	brain = new Brain();
 }
 
 Dog::~Dog() {
diff --git a/cpp04/ex01/Dog.hpp b/cpp04/ex01/Dog.hpp
index 9d67241..ba98c5f 100644
--- a/cpp04/ex01/Dog.hpp
+++ b/cpp04/ex01/Dog.hpp
@@ -6,7 +6,7 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/01/28 17:44:51 by rparodi           #+#    #+#             */
-/*   Updated: 2025/01/31 18:24:07 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/02/07 17:51:39 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,6 +14,7 @@
 #define DOG_HPP
 
 #include "Animal.hpp"
+#include "Brain.hpp"
 #include <string>
 
 class Dog : public Animal {
@@ -24,6 +25,7 @@ class Dog : public Animal {
 	protected:
 
 	private:
+		Brain *brain;
 
 };