What age do stallions start to mature?

Stallions generally reach sexual maturity around 18 months to 2 years old. However, it's important to note that:

* Full physical maturity takes longer: While they can reproduce at that age, they won't reach full physical maturity until around 4-5 years old.

* Individual variation exists: Some stallions may mature faster or slower than others.

* Breed differences: Some breeds are known to mature earlier or later than others.

It's crucial to manage young stallions appropriately, as they may exhibit strong sexual behaviors and be more prone to aggression.