Is it possible to make yogurt and cheese from spoiled milk? I get raw milk and to somehow pasteurize it, I boil it. The milk strongly curdled showing that it is spoiled and rotten (definitely, not suitable for drinking). Is it totally bad milk and I should throw it away? or it still can be used for making yogurt and cheese?
Even if it is possible, it is a very, very bad idea as you don't know what cultures or pathogens are in the already spoiled milk. 

Fermented dairy products should only be made from fresh milk in good condition&mdash;and in most cases, that milk should be pasteurized while fresh absolutely as soon as possible from the source cows.