Swallowing a significant amount of blood, do I track that?

Only if it isn't your own. Otherwise it's just recycling

HAHAHA

I've often wondered how to track the calories of other's blood that I am consuming? Does it matter how fat or skinny that person is? Because I tend to feed on larger individuals as they are easier for me to catch... how would I track 3 ounces, as that is what I have consumed today thus far...

Yes before you consume the liquid of your victims I would suggest getting you a lipid panel. Depending on what your nutritional goals are if you are eating lower calorie you probably would want to eat a victim that has blood low in triglycerides and low density lipoproteins or LDL. If they have a high HDL although higher in calorie it gives you some great healthy fats to your diet.

Great question.

Blood is processed, so you shouldn't eat it.