Remember everything but the title. Has animal transformation somewhat like Sex Pistols.

School where everywhere has a class abo in addition to the rarity pyramid like Sex Pistols, main character is a black wolf who doesn't appreciate all the lesser people throwing themselves at him, there was a girl cow. He eats the cow, if I remember right. He believes he'll find his mate once he finds the right scent. His best friend is a kind python who has already fathered many children, some of them sheep/snake hybrids.

A new beautiful omega from a famous family arrives at the school and the wolf mc is smitten. However he spies on the omega being frisky with two tiger or leopard twins then eating them to his shock. The omega is drawn with rabbit characteristics, but at the end, it turns out that he is the least rare on the pyramid. The omega is a worm creature that mimics rare creatures' scent.

Hello!
If I am right it is propably this one - Castehate

It is! Thanks!