Using a CD hunting on horses!!!

We always hunt horseback and my cousin and other huntin buddy both have catchdogs that hang around with the horses. We have a few dogs that are completely trash broke and if they are baying we let the cd take to em and we are right there behind them. If some of the other dogs are trashing (know this by the other dogs not taking part) they have a good enough handle on them to just tell the cds to stay and they will hang with the horses til the other dogs get called off. Not sure about the best way to train one from scratch because we have always had one older dog to take with a young one but I would just say handle is the key then them realizing what a bay is.