Alphas- They are seen as stronger and more dominant than the rest. They go into something called a rut every four months. When they're in rut, they can't control themselves and are more likely to attack omegas. They have a strong smell. They can't get pregnant.
Betas- Are like normal people. They don't go into heats or ruts. Only females can carry children. Don't have a strong smell.
Omegas- Typically seen as weaker. They go into heats once a month. When they're in heat they can't control themselves and are more likely to get pregnant. They have a sweet smell. Can get pregnant.