Why is my senior dog still vomiting after anti-sickness injection?

Hi there. I'm sorry Ziggy isn't feeling well! I am concerned that Ziggy has vomited despite the injection, and this warrants another call to the vet. Depending on what they gave (there are a few different types of anti-vomiting medications), they may be able to give a different medication (you might specifically ask if they carry Cerenia; this may be what they already gave, but it may be a stronger anti-nausea option if they gave something different initially). Beyond that, though, it sounds like more diagnostic information is needed to get to the root of *why* Ziggy is vomiting so he can be treated appropriately. Another thing your vet could do today is provide supplemental fluids for Ziggy, either subcutaneously (under the skin) or as an IV injection (which would require at least several hours of hospitalization) to help with dehydration.

However, I definitely agree with your vet that it seems more information is necessary - I agree that an ultrasound will provide helpful information, and if they haven't already run bloodwork, I would request that as well.

Hope this helps.