Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
Any retching, gagging, lip licking, drooling, or vomiting?
If you press on his belly, does he have any tensing, tenderness, discomfort, pain or does it feel hard?
Is he drinking normally? Can he keep any water down?
Are his gums nice and pink (not white/pale)? Moist or sticky?
Could he have eaten anything he should not have (ie bones, fatty food, toys, plants, chemicals, human meds, etc)?