Good for you for taking care of this poor baby!

Just stay really calm. Don't have company for a while. Make no sudden movements. Maybe you and him and Bailey could have a quiet time where you just sit there with them and stroke them both calmly. Let him get use to his surroundings, and then after a couple days, try walking him around out of the house. Maybe if he sees Bailey happt to go for walkies, he'll perk up a bit.

There was a time when I had to leave my dog Leather for a while. When I got her back, she seemed to have been hit. Everytime I put my hand in the air, she would squint and look away and shiver. So I held my hand up lots, and every time she thought I would hit her, I brought it down and stroked her. After a while she understood that no one would hurt her anymore.

Good luck!