RE the resting time learn to use all of your senses including smell. After butchering the smell can give you an indication of how long to rest it in salt water. The smell will differ depending on age, ***, diet, time of year etc. The stronger the musk smell the longer it should be rested in salted water. Young fryers typically have no smell other than a slight meat odor. Rabbits like this need only soak long enough to get most of the blood out (a few hours). A sexually mature buck can have a rather strong musk odor and needs a longer soaking. You don't have to stick your nose into the carcass. The smell is evident when you are skinning a still warm carcass even before you gut.