Any really, But you shouldn't breed a good horse until it is 4-8 they are its prime years.
Yes they can. Any pony can breed with any horse on Howrse.
Its When A Gorilla And A Orangutan Mate Or When A Horse Fly And A Horse Mate.
a Morgan Horse :P
the same way regular horse mate
no
No.
they mate at the age of nine months
Nope
Moose can mate at 1.5 years of age
they mate when their parents leave them.
I personally think that 5 is a good age to mate your dog.
It depends on what markings the horse and the donkey have.