
The "very common" rarity bar is now a brighter teal shade to make it easier to distinguish from the "common" green rarity bar. This color change will not affect the rarity of your pets, it's just a graphics update.
Custom Pets now have their own rarity bar declaring them to be "custom" instead of "rarity unknown" so it is easier to identify them. A custom is a unique pet which has been designed specially for a staff member or other special CS contributor. They are usually one-of-a-kind designs, which technically makes them the rarest pets on CS!
Click on these pets to see the new rarity bars on pet pages:

