Ricky is doing better tonight. He ate his first solid food at noon and no diarrhea or vomiting in 10 hours. He is still tired but did manage to jump up and down when he thought I was going on a car ride without him.
We will keep an eye on him and if he gets diarrhea again, I am going to try the boiled rice and chicken for sure.
Thanks everyone for your concern. It looks like it was either a virus of some kind. Hopefully the other two don't catch it.