My better half has a Tennessee Walker and he is a gorgeous thing and I enjoy riding him on occasion. With the cost of maintaining a horse she never hassles me if I want to bring another gun into my stable.
I once bumped into a fellow in the U.P. of Michigan who used to take his setter along and ride his horse down two tracks until the dog was on point. He then dismounted, shot the grouse (maybe) and mounted back up. The horse was drop rein trained and it worked really slick. If I lived up there and had the property in the right location I would try it out. One of the coolest things I ever saw.
Mike