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Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you today.
What color is the diarrhea? Any blood?
Did the vomiting start the same time?
When was he last wormed?
Are his gums pink or white/pale? Moist or sticky?
If you press on his belly, any tensing, tenderness, discomfort, or pain?
Could he have eaten anything harmful (ie bones, toys, plants, chemicals, human meds, etc)?