depending on the horse.some show vey soon (4-5 months) and some don't show at all until they are almost in labor, or until you can feel it kicking(awesome feeling). I'd say usually around.....8 months? but it really always depends on the mare.
yep, depends on the horse. my mare is an early shower, usually about 5 months she starts showing. by 9 months i cant believe she still fits through her stall door! she always gets real big.
and yes, the kicking is awesome. whats also cool to is when they move and you can see it... its like a little alien in there lol. i have been blessed to be present for all of our foals births and have them on video and photo, and its just majical every time.