If you really want to drink the body fluid from bull or OX than continue drinking Red Bull. Dont worry I am not just writing to create rumors. When you check the ingredients in Red bull you will find TAURINE in composition. When you check the Taurine on wikipedia it says it is widely distributed in animal tissues. It is a major constituent of bile and can be found in the large intestine.
And Taurine is named after the Latin taurus(Greek ta?) which means bull or ox.
So please dont drink it.