Mutations disprove the theory of upward evolution

[Zazzy]

Have you any evidence of a dog producing a cat offspring?
Or a cat producing a dog offspring?

And more fundamental misunderstanding of evolutionary science, with the same strawman. No evolutionary scientist claims this occurs, Grace. Again, why don't you learn what the tenets of the field are so you can mount a convincing case? It keeps looking really bad for you to argue against what no scientist claims or thinks.