You are wrong right from the start, evolution HAS been observed and tested repeatedly.
It's been observed in bacteria, in insects, animals, adapting to environmental pressures.
It's been tested genetically, what do you think DNA testing is? How do you think they know things like us sharing a common ancestor with chimps?
We've got transitional fossils that show gradual changes.
Your dog in to a cat argument is just a silly strawman, the theory of evolution doesn't say that at all.
Evolution is not about one animal suddenly turning in to another, it's about common desc