No.  Although all this 'milk symbolism' is associated with the ever-present danger of a mental break, taken together with all the other references, the implication of the symbolism is that rather than the illness being intrinsic, there is an extrinsically administered infective or toxic agent which is poisoning the milk.  This is in line with LmL's recent thoughts that the weirwood is harboring and/or attempting to detoxify a harmful agent that might have forced its way into the tree.  This make