The wild world

The structure of the hierarchy depends largely on the type of animal and tribe, but there are also general rules.
The common animals still remain, they are used as companions in the tribe.
Hybrids of one animal are not allowed to eat their own kind of normal animals.
Killing a companion of a stronger tribe means declaring war, but also gaining authority among one's own.
Hybrids do not hunt each other, at most they fight.

Before the meteorite fell, the world was normal. People lived in tribes, learned to survive, hunt, and evolve. But after a while, a meteorite containing an unknown gas fell to Earth. The gas quickly spread among nearby tribes, and from there, it spread to others. People began to develop tails, ears, wings, and animal-like habits, but they did not lose their humanity or grow fur completely; the fur only appeared on the new animal parts of their bodies.
New animals also came to Earth with the gas: dragons, pegasi, unicorns, phoenixes, and other fantastic creatures whose features appeared in humans.
There are very few normal humans left, and it's unsafe for them to be around hybrids due to the high risk of infection. Hybrids also develop new abilities depending on the animal they are raised on, such as enhanced vision, agility, strength, stealth, hearing, and so on.