Originally Posted by AlexS
I really think you have cause to talk to the parents. You don't need to accuse them, just state what happened, as you don't know it was them. Just ask them to keep an eye open, or have their kids tell you if they are aware of someone riding.
In addition to the no trespassing signs, it might be an idea to have one of those warning signs so you are not liable for any injuries.
I very much agree with Alex here.
I'm afraid though depending on state you can be still liable of someone's kid get on your horse on your property and is injured whether you have signs around or not. Crazy as it sounds, but I've heard about such lawsuits. So I'd spread a word that it happened, you are very upset, and you put up some cameras in field to get a prove for police/sheriff (even though you didn't