Thanks for the advice everybody!! =)
Ozzy is acting perfectly normal now. I think all he needed was a good rest, thank goodness.
I fed him breakfast this morning, and just to be safe I didn't put any wet food with his dry food. I think that helped him to chew it more. since it's not as soft for the swallowing.
Now he and Darlin are outside, and playing.
I think you guys were right. Just a little belly ache. Thanks again!!