Do you leave the new puppy crated when your at work? I keep mine in a crate when I'm not home to keep an eye on them. Each dog/puppy has their own crate. If you do end up taping then it might be better to seperate the little one from Navy?
I laugh because I know have a wall of crates for my three. My family room looks a little funny
They can be together yet are apart for safety reasons when no one is there to keep an eye on them