Hello, I am afraid that the expert you have requested is not currently available. Still 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?
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?
You noted hard lumps, are they in the skin or deeper in the belly?
Could he have eaten anything he should not have (ie bones, toys, plants, chemicals, human meds, etc)?