Hi
What about for raw animal blood as fertilizer ?
What is an animal blood NPK?
How to use it..?

I just took care of a beheaded chipmunk that my cat left in the garage, but I wouldn't touch this question with a ten foot pole.

Nor would I. Avoid, avoid, avoid. Any diseases the animal had (y'know, black plague, rabies...) are in the bloodstream. What, black plague? Yes, it's endemic to many states; the last outbreak was in San Francisco, 1902.

Dried blood is tolerable, but can burn. I'm not sure of the NPK of fresh blood, and not curious enough to look it up. I'm feeling a little queasy.

No idea. Although I reminded of the time a few years back that I had a rat near my bushes that got split in two by... something. I buried it in the yard not wanting it sitting rotting in my trash can.

A week or two later, that spot where I buried the carcass had the darkest patch of grass that my old lawn ever exhibited.

wow, I thought I asked some strange stuff... eesh.

Blood is fairly high in N, but as already pointed out, it can carry diseases, so I wouldn't use raw blood. It should be okay if you compost it first, but make sure you include plenty of high carbon matter or it will smell pretty bad.

Blood meal is often seen in stores as an organic fertilizer. Many find it icky. It is considered a hot fertilizer because it dissolves quickly and can burn the plant roots. If you are talking about fresh blood, then it would be equally hot. Fresh blood should probably be composted. Blood meal can be mixed in proportions of about 5 or 10 to 1 with any grain type fertilizer and applied. By mixing it with the grains it should not get enough concentrated quantity in one place to burn anything. A mixed blood blend would give you a greening effect much faster than the typical 3 week waiting period for grains.

Well do not use raw animal blood because of the pathogens that can be present not to mention will invite guest that are not welcome.

However Blood Meal is a great fertilizer. It has been steam processed and dried so all pathogens are dead, but it still can invite unwelcome guest, but scares the bunny rabbits and deer off. Blood meal is 12-0-0