That is funny while I am talking to someone about spaying wild mares. Trying to figure out why - much easier to castrate the stallions to control the population. My guess is there has to be a market for horse ovaries - odd but about the only logical reason.
NO
not in a horse just get a bunch of infected dead horses. I think they do that in sheep though. But it is not a male thought thing there is a money reason - has to be.
yes properly. Elastor bands on horses in not a good option.
Answer is NO on elastrator bands
"Image result for can you castrate a horse with elastrator band
Special elastrator pliers are then used to place a tight latex (rubber) elastrator ring gently around the base of the scrotum. … Elastration is normally limited to castrations done during the first few weeks of life, and it cannot be used for species where the scrotum does not have a narrow base, such as pigs or horses."
There has to be a lobby what wants the horse ovaries is all I am saying - or a think tank getting rich on doing a much more complicated procedure.