NOTE: MY trainer loves her horses very much, I have only heard of her doing this not actually seen it she just told me how she did it.
The reasons she did it was because her one old school horse went down in pasture and he was suffering, she didn't want to wait for the vet to come.
The other reason was, she had this cute little bay mare who was about nine years old, she came down with a horrible case of colic and it was either have the vet euthanize her and stress her out or die in mommy's arms, she chose captive bolt.
She is a very nice women, she just happens to use a less common method.
Whut did I just read?
I thought we were all supposed to start a movement against your trainers cruelty?
Horses don't have the emotions that humans do. They don't form the attachments humans do.
I'll put it simple for you as you're making it all clear as mud..
If your trainer knows how to shoot, it's not cruel
If your trainer doesn't know how to shoot.. Could be cruel and darn messy.
If your vet knows what he's doing, it's slow but not entirely cruel depending on how much jab they give.
If your vet sends a trainee that doesn't know what they're doing, it's cruel.
Clear for you?