I've got a few recipes, but I've never used them, so I have no idea if they'll work.
There's one recipe, called Blood Pudding, that might be a replacement if TK so desires. It's an actual recipe used in various cultures, but it's not so much drinkable, as it is edible. Also, if you can find the pig's blood, you can always offer TK to drink just that. Here's the Blood Pudding recipe I found online:
Ingredients:
1 quart pig's blood
12 ounces bread crumbs
1/2 lb. suet
Salt and pepper, to taste
1 quart milk
1 cup cooked barley
1 cup dry rolled oats
1 ounce ground mint
Preparation:
Mix all ingredients together in a bowl; pour into a large kettle or Dutch oven and bring to a boil. Pour into a wide shallow bowl and season again if necessary. Chill thoroughly, until firm. When cold it may be cut into slices and fried.
Another thought is to make fake blood from one of the following recipes and cook it in cast iron {to get a little more iron out of it} and maybe even add some cow's blood {from a steak} to it. I got this recipe from a place called "the Raven''s Fake Blood". I just copy and pasted it here word for word so there'll be some of her commentary included in it:
Chocolate Blood
I was promised the recipe years ago, but only came across it quite recently. It was worth the wait. The mixture may seem odd, but it tastes pretty good, looks surprisingly like real blood, splatters like real blood, dries like real blood, and had several people asking me if I was really okay after that staged fight....
1/2 cup water
1 tablespoon cocoa powder
3 or 4 tablespoon corn syrup
1/2 to 1 teaspoon red food coloring
2 drops yellow or green food coloring (optional)
Mix the cocoa powder thoroughly into the water before adding the other ingredients - it may help to use warm water. After adding the rest, blend the concoction well, and then wait for it to settle a bit. Either skim the bubbles & chocolate scum off the top with the edge of a kleenex, or pour the mixture into another container. The longer it sits, the more the cocoa tends to settle to the bottom, which oddly mimicks the effect of real blood seperating.
If you splatter this mixture onto cloth, it makes neat two-part marks which dry into pretty convincing bloodstains. If you let it run from a victim's mouth and then let it dry, the blood darkens and cakes to the skin in much the same way real blood does. I can also say from personal experience that any washcloth used to wipe down the 'bloody' face afterwards looks remarkably realistic, too.