That is a good idea actually! After some TLC from the dog damage, the old coop could definitely work as a short term quarantine house. I'd just want to make sure it's 100% predator proof this time. Luckily I was given three full size sheets of OSB for free, so maybe that's a subtle hint to just build a new one.
I let each of my daughters pick a breed of chick that they wanted, and we had to order more than we needed for shipping purposes, so we have two Golden Laced Wyandotte's, two Partridge Plymouth Rocks, a Salmon Favorells, a Light Brown Leghorn and a mystery chick/poult. So we'll have an extra GLW and PR that I think will be going to my neighbors, and depending on our mystery chick, we may swap one of the others as well. It depends on what we get.