They can get sick just like we do so I wouldnt necessarily panic. I would keep an eye on him, or have your son make sure he seems ok. Mygsy was just under the weather a while back and it took him a couple days to feel good again. In fact he even didnt eant his green beans which is a sure sign so I offered him banana and he turned that down, something that NEVER happens. Anyhow we just let it run its course. I would make sure he doesnt just throw up and not drink. Maybe get him some pedialyte to get fluids in him. He hasnt eaten anything unwanted I assume?