I got my first foster dog yesterday

I had just started opening my mind to the idea and twice this week we had situations at work where we thought we were going to need to have a foster for a dog in our domestic violence shelter. The first one was worked out but the second was not so... last night I picked up a 3 year old Shih Tzu.
He is coming from a REALLY bad situation and I hope his mom is able to turn some things around soon so they can be reunited. He was very traumatized for his first 24 hours. Would just stand still, not making a sound, or sleeping in his crate. I was able to walk him a little. But he was hardly eating and hadn't had a drink in 24 hours. Stayed quiet in his crate all night. Today after work I soaked some of his dry food in chicken broth and was able to hand feed him some. Then... I never do grocery delivery but I was desperate for this boy and had some wet dog food delivered (and threw in other groceries to justify) and omg he inhaled it. Then he got the zoomies and brought me one of his toys and we played fetch until he tired out. Then we took a walk and he drank a bunch of water. It's a joy seeing him be able to relax and play.