Although to design, someone must act as designer.
To say "the design of animal" is not implying a designer.
The deeper I study the biology of the human body, it becomes relatively clear that this did not happen by chance.
Evolution isn't "by chance".
The DNS RNA structure and programming clearly demonstrated a well-engineered model for cellular proliferation.
How so?
That said, I have also studded evolution and can see where within species, or as one species takes president over another, or when adaptation to survive in a changing environment is required that this is great example of programed engineering at the highest level.
What, specifically, are you thinking is programmed engineering by a designer?
The Big-bang, theory has relevance too for the creationist. We do it all the time when we use high explosives to start nuclear fission. So why couldn’t the universal engineer set up the physics, time, etc, to create and perpetuate matter into existence and start the underlying processes to develop what we know as the universe?
Sure. But... there is zero evidence for it.