Hello and Thank You for contacting JustAnswer
I am sorry your little one is not feeling well.
Has he had any new foods, new treats or human foods?
When was the deworming done? What product was used?
Was a fecal done by the vet , if so was it done at the vets or sent to a lab?
What time did he last eat?
What breed is he?
No problem I am glad to here he is doing better.
If the problem is resolving it may just have been a simply digestive upset. This can happen from new foods, little bites of human foods or eating something you are unaware of.
This can also be due to parasites such as giardia or coccidia.
These can be missed very easily when a fecal is done at the vets. If the diarrhea or not eating return I would ask the vet to send a sample out to the lab.
Some owners find pepcid ac helpful for nausea
Here is a link to the use of this medication
To help with diarrhea adding fiber to the diet works great. This is useful for both diarrhea and constipation.
Here is a link to the use of Metamucil in dogs
I hope he continues to do well, Happy New Year