Noah had only two of the dog kind which would include the wolves, coyotes, foxes, mutts, etc. Animals have diversified into many varieties in the last 4400 years since the Flood. This diversification is not anything similar to great claims that the evolutionists teach. Noah did not have to get the animals. Noah did not need to bring all the thousands of insects varieties.
Many animals sleep, hibernate, or become very inactive during bad weather.
The pre-Flood people were probably much smarter and more advanced than people today. The longer lifespans, Adam's direct contact with God, and the fact that they could glean the wisdom of many generations that were still alive would greatly expand their knowledge base. The Bible says that the highest mountains were covered by 15 cubits of water. This is half the height of the ark. The ark was safe from scraping bottom at all times.