I'd just keep an eye on him for tonight. Do not give him anything else by mouth tonight (no water or treats or food), and monitor him for the vomiting or diarrhea. If he becomes ill, you may want to have him seen at a local emergency clinic, just to be on the safe side, but I don't expect to see any signs at all.
I hope this helps.
Thank you for your help!
He seems to be doing fine! (Lazy as usual-- but nothing abnormal)