Hello & welcome, I am Dr. B, a licensed veterinarian & I would like to help you with your wee one today.
Any retching, gagging, lip licking, drooling, or vomiting?
Can he keep any water down?
Are his gums nice and pink (not white/pale)? Moist or sticky?
If you press on his belly, does he have any tensing, tenderness, discomfort, or pain?
Could he have eaten anything he should not have (ie bones, toys, plants, chemicals, human meds, etc)?
Since he is panting, can you take a breathing rate for me (just count her breaths for 10 seconds + multiply by 6)?