Most folks do kill and hang them for a good bleed out, it does make the meat taste better but that is all a matter of opinion. there is nothing wrong with eating it if it didn't bleed well, heck what do ya think the dear hunters do with 200 lbs of blood fill meat, they devour it. I however do prefer a good bleed as I want to taste the meat without the blood so I can distinguish what my program is doing.
Blood in the meat definitely changes the taste. Try killing one with a blow to the head and let sit for 15-20 minutes vs. bleeding. In game animals it makes a huge taste difference. Its the amount of iron left in the meat that affects the taste.
It depends on your beliefs. For my family and friends, the animals are properly bled. With birds and animals such as goats and rabbits this means cutting the jugulars and letting the heart force the blood out. Goats are usually hung upside down so anything remaining will drain.
Genesis 9: 3 Every moving animal that is alive may serve as food for YOU. As in the case of green vegetation, I do give it all to YOU. 4 Only flesh with its soulits bloodYOU must not eat
Leviticus 17: 13 As for any man of the sons of Israel or some alien resident who is residing as an alien in YOUR midst who in hunting catches a wild beast or a fowl that may be eaten, he must in that case pour its blood out and cover it with dust. 14 For the soul of every sort of flesh is its blood by the soul in it. Consequently I said to the sons of Israel: YOU must not eat the blood of any sort of flesh, because the soul of every sort of flesh is its blood. Anyone eating it will be cut off.
That is one reason to age in salt water. It draws the blood out.
If you did not age it in salt water and just froze the meat you can still do it. I use about a teaspoon of salt with water to cover. Sometimes when I do a lot of birds they don't get bleed long enough so I age with salt water, especially the older ones.
Just defrost it in salt water for a day or 2 in the refrigerator. Rinse, drain and cook as desired.