Has it not got down as thin as the homeopathic soup that was made by boiling the shadow of a pigeon that had starved to death?

Summary

This quote sarcastically suggests that something has become extremely diluted or weak. It compares it to a hypothetical homeopathic soup, which is a form of alternative medicine where remedies are highly diluted. The example of boiling the shadow of a pigeon that had starved to death highlights the absurdity and lack of substance in whatever is being referred to. Overall, the quote implies that the subject in question has lost its original potency or significance.