I was reading a thread earlier and now I have a HUGE question and I didn't want to steal the thread, so I am putting it here.
The person mentioned that she had a "marble" implanted in her mare so it's okay to have it with the mare's yearling colt.
I no NOTHING about breeding and as until today I thought the only birth control for a mare was to never let them near a stallion or fertile colt. So, what is a Marble? Are there other forms of birth control?
Just so you know, I do not have a mare, I have a gelding. I am not planning on giving a horse birth control, I'm just really really curious as I have never heard of methods before.