I love the idea of that.
We brooded ours in the house... and it gets really dusty.
I suggest you get one of those heppa floor filters to put next to it. If her O2 is low now, the dander dust won't help. But the chicks will, so do not abandon the idea.
I also found the cheeping started much earlier in the morning than I did.
By the time they were ready to go out into their new coop... I was SO ready for them to go out into their new coop.
But it was fun.
And the dogs were curious but not a problem. That surprised me. I think they thought if the chicks were in the house, they must be family, and we do not eat family.
While I will never trust dogs around birds, and I'm sure you don't either - predator/prey thing being unpredictable - I love that last sentence!