Yes you can as long as you use a product that’s freeze/thaw stable. Keep in mind slip resistance as well

No. Many people with large dogs have hardwood flooring. Your dogs will scratch the floors and it will cause more wear; however, unlike vinyl and laminate floors, hardwood can be refinished in the future. Keep in mind that even under normal circumstances, your hardwood floors will scratch. That being said, as hardwood floors age they tend to mellow.

Yes, to some extent you need to pay a little more attention to your hardwood floors than say, a ceramic floor. Proper maintenance and using the proper cleaning products will greatly add to your floor’s life. Once you get used to its care requirements, you will likely find that it is a very forgiving floor to live with.