One Pullet left

I’m a first timer and we lost 3 of the 4 girls we had to our own dogs yesterday. I’m completely devastated that I failed our babies. My kids are heartbroken. They had only been outside in the coop for 3 days and I let our two dogs out on their own for the first time for a few minutes. They busted into the coop.
My favorite Pullet was left unharmed. She is 6w old and is just so sweet. Even though I feel so defeated I know we need to get her a new flock.
Can I start introducing her right away? Bring her to the broader to see them until they can visit with her in the run? Any advice on this will be helpful.

I just want to add that we reinforced the coop and purchased a larger run to place the coop inside. We also plan to add additional heavy duty chicken wire around the bottom of the run. The dogs are not allowed outside unsupervised, which is annoying. I’m hoping after we finish the new run and the chickens get larger they may get used to them. It’s really only one of our dogs that is obsessed with them. We have had our dogs for almost a decade and I never thought that they would be the predators we had to worry about. Anyone have dogs like this that eventually learned to leave them alone?