These are the different Tibble Bits in Beast Survival.
As you progress in the game, although the Tibble Bits won't satisfy your hungry, you can still collect some for raising stats... and there's more than the ones shown that will start to show up.

The only ones that are not to be eaten are the Bad Tibble Bits. They can harm you and cause you to get ill. They can even attack you if you get too close.

Later in the game you can collect Tibble Bits and raise them as pets and breed them to get Ribble Bits. When you're at that point, you can catch Bad Tibbles and purify them.

The Rage Tibbles... (or Black Tibbles), they raise your Rage meter. When you go into Rage, you're at your strongest and can pull off bigger attacks and bigger Chomps.

Tibble Bits & Beast Survival © me