Sick about Sammy

It's my sad duty to report that my sweet little puppy is still battling some sort of bug. I'm not sure what's going on with him - if it's separation anxiety, trauma, or if he just ate something funny, but he's not in tip top shape. We've had to resort to lining the floor with towels and I get up several times a night with him when he's crying to go outside. I hate seeing him so sick! I even tried to jazz up some rice last night for him for dinner to help, since my sister's vet told her to do that when her dog had a similar problem. So far nothing's working. I hate this. I wish I knew how to make it all better for him.