Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
Any gagging, retching, lip licking, drooling or vomiting?
Is he drinking normally? Passing urine and feces normally?
Are his gums pink or pale/white? Moist or sticky?
While you noted your findings when touching the belly, if you lift him with pressure on the belly or press on his belly, does he have any discomfort, tenderness, or tensing?
Could he have eaten something he should not have (ie bones, toys, rocks, plants, chemicals, etc)?