A few months ago, I noticed that my boy was marking on a few baseboards. I caught him in the act twice. Both times, I gave him a firm "NO" and carried him to his pad. I cleaned up the areas I saw & was so proud of myself because I thought I had solved the problem. But of course, nothing in life is THAT easy.
I have recently discovered that he's marking on a bookshelf & one of the banister railings of the stairs leading to the 2nd floor. To complicate things even more, my little girl has become confused & I caught her peeing in the middle of the landing near that banister. I also caught her peeing on the rug under the dining room table this week. She even left a poo in the middle of a bare hardwood floor

Twice! My husband is livid & wants to re-crate train. I am willing to do that if I have to, but I'm not sure that re-crate training is the best solution to the problem. I don't know if this is a marking problem or a potty training problem - or both?!
My pups are (or WERE) pad & outdoor trained. My boy lifts his leg when he goes potty outside. Should I discourage that? He doesn't lift when he goes on a pad. We have a new little girl coming in June & I need to get my 2 older ones in check before she gets here. Should I start all over with Potty Training 101? And if I do, how do I discourage the marking?