Oh that is a lot of damage, what a sweet looking dog too!
I'm sure they probably do walk & exercise the dog a few times a day??
If they aren't in a position, especially with a new baby coming, they should think about someone with a farm or maybe a lot of land where the dog can run and get a lot of energy out.
That's the difference with small dogs vs large, it takes more then running around the yard to really wear them out.
Wrigley has separation anxiety, though it's not as bad as when she was a puppy. She chewed the walls, baseboards & window sills. Someone is usually home though, so she's not left for long extended periods and she's outgrown the destructive behavior. She lays with her big sister & that helps her!
I hope they can rehome to someone that is home more and/or has a lot of land. I feel for them!