Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with today. I do apologize that your question was not answered before. Different experts come online at various times; I just came online, read about your wee one’s situation, and wanted to help.
Again I do apologize that my colleagues could not aid you sooner, but can you tell me:
Any chance of head trauma, injury or toxin exposure?
Any gagging, retching, lip licking, drooling or vomiting?
Any changes to his breathing?
Are his gums pink or pale/white? Moist or sticky?
If you feel and press on areas of the body,, any discomfort, tenderness, or tensing anywhere?