A few problems with this statement. First, you have to be aware of the scientific meaning of "theory":
A theory is a broad explanation that synthesizes many different once-unrelated facts observations, facts, and findings to explain natural processes or phenomena. Theories are very well-supported by available evidence and very widely accepted by the scientific community.Evolution is such a theory, well supported by evidence and widely accepted by he scientific community. New discoveries have only strengthened the evidence, and no evidence has been found against the theory of evolution.
Second, you have to understand what the theory of evolution actually says - it does not say " one animal became a different animal". Good try.
and no evidence has been found against the theory of evolution.
So proving a negative is now the way we do science? I guess it works for man-made global warming and man-caused disasters and man-caused everything