I think if you read my full post it is clear that I also address this issue, giving multiple examples of which raw food is only one. Sure, dogs can act impulsively and chase a prey animal and find this fun. But dogs are intelligent, social animals who are highly trainable, easy to motivate and very adaptable. Either way, I do not believe that a "taste for blood" whether actual taste for blood or symbolic of a prey drive is something that can not be solved with training.
It is likely an impulse control issue which is why I suggested impulse control training.
You've pretty clearly never had an actual high drive dog, sorry to say. Yes, LOTS of dogs can be trained with impulse control exercises, and even high drive ones can be trained to control themselves with strict supervision. But a dog with high drive, especially one who has actually managed to catch and kill something, will NEVER be completely trustworthy around prey animals.