What age is a horse mature?
A horse can mature in size normally at the age of 3-4 years old
but can take longer depending on breed and previous nutrition. A
horse can mature mentally anywhere from age 2 to age 6 it depends
on the environment and training and the horse itself. A mare
matures sexually at about 3 years old, but its bad practice to
breed before age 4- pregnancy can be damaging to a young horses
body and maturity as well as being very stressful both physically
and mentally resulting in miscarriage, early foaling and bad
parenting. A stallion can mature as early as two years old (depends
on the dropping of testicles). A colt can exibit "studly" behaviour
at age 2 but not be physically mature to produce offspring.
Typically 3yrs is mature sexually for a stallion.