The trials that we put on are pretty ranch orientated, cattle only, mostly yearlings sine they are more convenient, alothough I have been to some where they used bred cows.. We do it horseback, handler can't get out of walk so the dog has to the work. The handler can definitely help the dog at obstacles, but can't get into the obstacle to help.
To start the dog has to go gather the group, three head most of the time, and bring them back into the course. Handler must remain behind some spot until the cattle are brought back past said spot. The handler can go help if the dog has problems, but loses fetch points.
We use several types of obstacles. A "T" is set perpendicular to a fence. Cattle come into the tee along the fence. If the leave the "T" to the left they get 3 points per head, to the right 5 points per head. You can put your dog in position to gain the highest points or let the cattle go wherever. Short pen is set along a fence with two panels and a gate on the end. Push cattle in to the "pen", dog hold cattle while handler rides up to open the gate, dog pushes them through. If cattle break over the dog, you have to reset the gate and try again until finished. Two panels sel paralell to each other. Cattle get into the panels and you have to send your dog around to stop them before they pass through the other end and bring them back the end they went in. Finish by loading into a trailer, etc.....
There are several obstacles, but all are practical to a point. It is fun to go to one or two a year I think.
There are alot of dogs that are bred to trial. They can be a little hyper, but you don't really want a hyper dog to trial with. Very few dogs are real hyper that trial and can get the job done on cattle that most the time are not dog broke.
I just thought I would bring up the subject because we had a meeting yesterday and there is difference between a few people in our group. I want dogs that are bred to work for anything. There are a few people in our group that want to breed dogs strictly for trial. I think if a dog works, it should be able to trial if it has some direction and manners.
I totally agree with Jinglebob on what he first wrote. There is a difference in sheep and cattle dog lines. Also about working broke livestock. Ours are pretty much dog broke, although some will always have to fight even when they don't have a calf at side. It is fun work dog breaking the heifers each spring though!!!!!!