I'm sure I'm not saying anything you don't already know and have likely mulled on some.

You need a dog. Other than the hyper types (Terriers and such) most any dog will do. Dachshund are a good choice, but have hard time walking long distances. Most any dog with a decent nose and that doesn't mind spending time in the truck while you are hunting will do.

Something about Hog blood that drives most dogs nuts, it really doesn't take a whole lot of training in my experience. Just a long leash and hold on.

Most any of the hunting breeds will do, but in my experience smaller is better. You may have to carry your dog some. Smaller types are easier to control.

I had a 80-90 pound Weimaraner that would pull me off my feet if he got a whiff of Hog blood. A dog about half that size would likely be better.

I have a twenty pound Terrier now with a bit of Beagle in him. Works a blood trail well. A little on the hyper side when left in the truck. Many of the hunting breeds are either coach potatoes and sleeping or in full hunt mode, which works out better.

IMO every hunter needs a dog.