We just had a front fence with dog wire constructed at our property but the driveway gate is yet to be attached. This morning two small neighbourhood dogs got in and attacked two of our laying hens Washington and Breanna. We took them to a local vet. Washington's injuries were bites to her rear and loss of all tail feathers. The vet gave her an antibiotic injection and cleaned up the wounds with betadine. We were able to bring her home. She is resting in our bathtub. Is drinking and has eaten scrambled eggs and a live cricket. Breanna had a lot more damage and blood from tears on her neck and side. She also had antibiotics and is staying overnight there. The vet gives them both 50/50 odds of surviving the night. These are our first pets as a family and we just adore them. Any advice for their care would be appreciated. We have five other chickens that I will keep locked in the chicken run until the gate is attached. When should I return Washington to the flock?