Sounds like you don’t believe it really happened. Apparently you have not heard the ideas of bringing in juvenile or even infant versions of each animal kind nor the idea that most any species has the ability to hibernate esp. under extremely stress-filled conditions.
If the rain water wasn’t fresh I’m fairly certain God provided a way for their every need. Heck, even now a days He provides for the atheist’s every need, doesn’t He?
creationscience.com - the only plausible explanation for our present-day conditions and it’s rich abundant variety of life forms imho.
Here’s the problem. You just can’t go around making calculations about the probable size of the Ark to “prove” that it was capable of floating the purported weight of all the animals, and then when someone points out some of the other logistical issues Noah would have to deal with suddenly revert to miraculous help involving animals in suspected animation or their food/water being provided (and waste disposed of) by miraculous means.
You can logically claim either scientific/logical support for all aspects of the Bible story of Noah, or you can claim that the whole thing was a miracle outside the normal bounds of science. You cannot, IMO, logically claim that science supports your position on aspect A of the issue and therefore the story true, while abandoning science and going to the unknowable powers of God on aspect B when you cannot support your position by science/logic.
Or, more accurately, you can claim anything you like. But you damage your own position when you mix science/logic and divine intervention as convenient to you in a single argument. Or at least that’s how it looks to me.