Ever wanted to change the eye color of an existing pet? It's possible, even in vanilla game and with no external programs!
This tutorial will guide you through the simple steps necessary to change your Pet's eye color. (And it's genetic, too! Your new kittens or puppies will inherit the new eye color instead of the old one.)

Please note: the target Pet needs to have an owner / be playable. Stray pets cannot be modified this way, unless you do use mods or cheats to temporarily add them to the household.

Step 1: Load the household with the target pet. Have your Sim click on their phone and select Pet Registry.../Register breed.../Your target pet.


Step 2: Save and exit the household. Enter Create-a-Sim. Create a new pet.


Step 3: From the breeds selection, select the breed of the target Pet that you've just registered.


Step 4: Change the pet's eye color to the desired one. At this step, you can also adjust your Pet's markings, but it's totally optional.


Step 5: Go back to the coat and markings selection. Select the "coats" button.


Step 6: Register your current coat as a new one.


Step 7: Exit Create-a-Sim and load your target household again.


Step 8: Have your Sim change the Pet's appearance in the mirror by selecting Change appearance for your pet.../Your target Pet.


Step 9: In the first screen that pops up, select the coat that you've just created. You may notice that the Pet's eye color has changed accordingly.


Step 10: You're done! Your Pet has a brand new eye color which is now genetic, which means that future kittens and puppies may inherit it.