Ok great. Thank you.
There is a lot you can try at home today.
1. Do not feed him anything until 8 hours have passed since he vomited. To help keep his blood sugar up during this fast you can put a spoonful of honey, or pancake syrup, in his mouth every 3-4 hours.
2. To help settle his stomach
you can give him a human stomach acid reducer like pepcid ac or zantac. 1/4 of a tablet, per 1-15 pounds of dog every 12 hours. It is fine to give the stomach acid reducer with metronidazole.
3. After the fast offer him one bite of plain cooked chicken
and cooked rice or pasta. Wait an hour to see if he is going to vomit or have diarrhea. If he does, wait a few hours and try again. If he dose not vomit or have diarrhea then gradually give him more of the chicken and rice mixture. If you do not feel like cooking you can use a rotisserie chicken from the grocery store and ready cooked rice.
4. If his gums feel dry to the touch then he is probably dehydrated. In that case, give him a tablespoon of children's pedialyte drink with a syringe or eye
dropper every hour until his gums are moist.
5. See the emergency vet today if:
He becomes very lethargic and he is not getting up and moving around.
His gums turn pale or an abnormal color.
There is blood in the stool or vomit.
He can not keep water down for more than 12 hours.
6. If he is still having diarrhea tomorrow he needs to see the vet again. The next step would be blood work to rule out infection or metabolic disease. For example, liver inflammation can cause vomiting or diarrhea. That is just an example but not to make you worry.
7. No vetprofen while he has an upset gi tract with vomiting or diarrhea.
How does this plan sound? Do you have any additional questions?