Wow, that sounds pretty crazy. I’m really struggling to get my head around how it was allowed to carry on for so long by the riders? My response would have been to send my horse forward, immediately, by any means necessary.
A kick to horse or human can be fatal – I take it very seriously. Group rides can be so problematic and I’m very fussy who I ride with. I will do group rides if they are well organised and have clear rules. There are various acquaintances I’ve been out with once and once only due to their poor manners – no control, no consideration of others, not riding to the ability of the greenest member (horse or human).
As a rider you are responsible for keeping your horse under your control at all times – maintaining a safe following distance etc. But IMO if you ride a horse that kicks then you are doubly responsible for keeping others safe. Unfortunately you cannot rely on other riders to use their brains & ride carefully all the time. This may mean that you limit where and who you ride with – ie always at the back of the group, pulling over and let others pass safely, choosing to ride with people who are switched on and in control etc.
If a kick does happen then it must be punished immediately and very firmly.
I have had two mares as field hunters. I rode both with red ribbons and was very careful about where & how I rode them in the field – keeping them at the back of the group, out of the way at checks, turning them to face other horses - but still both kicked out and made contact once each. The bay mare was when someone used her as a stopping aid - she was halted off to the side, with her quarters turned away! (I will never forget the conversation the master had with that rider!). The chestnut mare was on the last hunt of her first season, I had her parked well off to the side of the group, was watching the hounds work and some woman decided squeeze between her and the fence behind her. It remains a baffling mystery to me why she did that – there was a whole open field in front of us . . . but it was not unusual for me to find my own space and immediately have someone ride right up behind us . . .
Now it’s one of my horse shopping must haves – a horse that is ok with other horses being really close – just because you can’t control other riders.
I love my super tolerant gelding – though even the most tolerant horses can still have a bad moment -he kicked out at my friend’s horse one day (luckily got her stirrup iron). He hasn’t lifted a hoof at horse, hound or human before or since (fingers crossed it never happens again!)