Thank you again,
The shakiness is likely just a non-specific sign that he feels unwell. It usually settles if we can get them feeling better. Now that breathing rate is high for your lad. Resting rates should be ~20-30bpm. That said, if his gums are pink and he is potentially uncomfortable, it could be that that is triggering this elevated rate as opposed to respiratory distress. Though we will need to monitor it.
Now to have a young dog with gas (which can be painful in the gut), diarrhea, and agitation; this usually is associated with dietary indiscretions or ingestion of harmful things. Still, hopefully that is less likely here. And if you are sure, then we'd have to consider other issues like viral or bacterial GI gastroenteritis or pancreatitis.
With those in mind, we'd want to start some supportive care while closely monitoring him. Since lip licking is a sign of nausea, we can start by treating with an antacid.Comon safe dog options are:
* Pepcid (More Info/Dose @http://www.petplace.com/article/drug-library/library/over-the-counter/famotidine-pepcid)
*Zantac (More Info/Dose @http://www.petplace.com/article/drug-library/library/over-the-counter/ranitidine-hcl-zantac)
* Tagamet (More Info/Dose Here @http://www.petplace.com/article/drug-library/library/over-the-counter/cimetidine-hcl-tagamet)
Whichever you choose, we tend to give this 20 minutes before any food to help soothe the stomach. Once that is on board, we can try a light diet like rice with boiled chicken, white fish, scrambled egg or cottage cheese. This can be offered in small meals to help settle the stomach. And as it is easy to digest, it will help with the loose stool as well.
Further to this, since you noted a lot of gas, you could give him a small dose of Simethicone (which is over the counter at most pharmacies and often sold with human baby medications or as Gas-X). When using this, you can give a dose of 1mg per pound of his body weight every 6-8 hours. As well, a canine probiotic could be of benefit if we have gas since often this will be related to a disturbance in the good gut bacteria...