Hi Beth,
Sorry your dog isn’t feeling well. It’s definitely a good idea to go see your vet when vomiting happens routinely or more than once. It could have been the treats, but who knows. Try offering boiled chicken and rice, or withhold food for the day and offer tomorrow and see if things change. Did you change the regular food that he’s getting , that could be it too, unless you have kept that the same. To be safe, I’d go see your vet.
good luck!
~Kelly
I was going to take it to the vet today but realized it was too late.. Thank you for your help btw.