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Hi this is Dr. Hill. I need to ask a few questions about Katie.
What is her normal diet?
Do you give her any medications or supplements?
Does she get any people food or marrow bones?
Did she keep the food down that you gave her last night? Since she is vomiting her food 8 hours after eating, that tells me that she is not emptying her stomach. This can be due to decreased motility in her stomach or obstruction to outflow from the stomach. An outflow obstruction would be due to foreign material blocking the pylorus or a narrowed pylorus due to swelling (typically neoplasia). Decreased motility is usually due to inflammation. This can be from a dietary indiscretion or due to allergies (history of a sensitive stomach). I would get her to your local veterinarian so that they can start the process of figuring out which is the issue.