Yes, there is quite a bit written on the subject if you do a search - this is a popular concept in Europe in my understanding, and there are a handful of breeds considered all-around dogs that can point and retrieve on land, retrieve in water, and be trained to scent track a blood trail. Weimereiner, Vizsla, GSP, GWP, the mentioned Munsterlander, and a few others are considered the starting point for an all around hunter, which also makes a good companion. A Vizsla WILL be my next dog. Upland bird training first, then if there's time, scent tracking. You may have to put an insulated jacket on some of these breeds to keep them warm if they're retrieving in water, as they don't all have a lot of fur, but other than that, they're true all arounders, *IF* you find one of the right breeding stock. Some are more birdy than others. I don't know if these make good rabbit dogs or not, however. I kind of doubt - a rabbit dog's skill/ instinct is very different.