This is a very easy method to make new collar recolors.
[Download]
It's very easy to do. Just place the items into your Downloads folder and follow these steps:
Step 1: Open BodyShop
Step 2: Create an accessory recolor using the Custom Collar Template. Make sure to replace both of the NylonBlue images.
Step 3: Open the newly imported package and replace all XMOLs with the correct xmol.xmol file in the template (everything has been labeled, so it should be easy to tell which one is needed).
Step 4: Generate a new Family (dtstring) value and replace the old one. All of them can share the same family.
That's it. You can now delete the kit if you want. I included the meshes for custom mesh creators as well, but they aren't even required for this kit since they're already in the game (well, except the puppy and kitten collar mesh). These are very simplified steps because I assume that you already know how to make accessories for human sims. The process is nearly the exact same, with the only difference being the XMOLs are pet enabled.
If anyone is having any issue with this, feel free to reach out
