Random question - how do you know if your dog will be interested?
You take them and give it a try
Some adult dogs who haven't been exposed to chasing games or who've had a lot of training need more than one exposure or to run with my experienced dogs to get their confidence up that they are allowed to chase it all the way.
Savvy got his first two CA legs easily but failed one run last weekend because he stopped chasing half way through, pooped and came back to me LOL. The second run he did better but he still tends to want to check back with me when he gets too far, probably because I have been really working on his recall/checking in lately. When he's chasing, he's really fast and intense so with him it's just a matter of exposure and him knowing what he's supposed to do. He did get his CA but I ran him again with Whim, who is very keen to chase no matter what to encourage him to see it was ok to be so far from me. The local coursing people here are very friendly and helpful, if you have a dog with the interest and instinct but who is having a hang up they will try to help you work with them.
Jagger used to go coursing years before it was an all breed sport but hadn't been for a long time when we went to the first CAT. His recall is extremely good and the first try he was excited and started real strong but you can almost see him go..."wait a minute...not allowed to do this" and turn back to me. I started him again and told him "ok get it!" and he easily passed. I just have to remember to release him with "ok get it", so he knows he is allowed
So different dogs are different and need different things. Some dogs start easy, fast and only get better and better with each new try. This is how most of the Belgians have been. Some dogs who start slower or have a lot of interest but not confidence in it being ok to go so far away need more exposure but can become great at it. And some dogs are really good at it but develop issues down the road. A friend of mine has a Beardie who does love it but he gets very distracted by the pulleys and stops dead to inspect them every time he notices them. He requires the lure operator really keeps the lure at an optimal distance for him, to keep him interested in moving.