Yes you can.
The following link will elaborate:
If your pet is nauseated or sick with vomiting or diarrhea issues:
To help settle the stomach you could try one of the following drugs. My favorite product is Pepcid (an over-the-counter antacid).
Pepcid comes in 10mg or 20mg tablets. You can give it every 12 hours.
Pepto-Bismol (NOT TO BE USED IN CATS)
Although a veterinary examination is always going to be recommended, especially with vomiting episodes and/or diarrhea, here is a bland diet recommendation:
Boiled boneless, skinless chicken breast
Cooked white rice
Low-fat cottage cheese
*Never add on salt, pepper, oils, butter to any of the above
*Ideally, give 1/3 chicken or cottage cheese, and 2/3 white rice
*Sometimes, you will see cooking hamburger meat being recommended and taking off the fat. I try to avoid this option as it can exacerbate pets that may have pancreatitis. Chicken works great.
Veterinarians will often prescribe some prescription bland diets like Science Diet I/D or Iams Low-residue. Both are wonderful options
Definitely, get into a vet if any symptoms of illness have already persisted for more than 2 days.
No. Impossible without being able to do my own exam, and review test results.
However, I would suggest absolutely getting a second opinion from an internal medicine specialist at this point. Especially, if your vet is now doing random treatments or tests.
Ask for the referral, or you can find an internist yourself using this link:
Find Various Specialists
--> Under "specialty" select SAIM = Small Animal Internal Medicine
--> Or, you can search for a Neurologist, Cardiologist or Oncologist
Depends on dog's size, dehydration, severity of losses (vomiting, diarrhea).
I probably would not give much more than a 1/2 cup at a time.
I can't help anymore.
At 8 pounds, you really need to get him into another vet or the specialist for a second opinion. The longer you wait, potentially the poorer the prognosis.
Not a dismissal.
Your original question for $9 was about giving pedialyte.
I extended my answer, in the interests of trying to help more by offering the other suggestions.
You continued to ask even more questions. I really tried my best, XXXXX XXXXX you mentioned the other details of what is going on and its only an 8 pound doggy, my red flags went up. The more I continue to try and assist with over-the-counters, the more harm I could be doing by delaying you getting into a vet.
My goal is to get your pet the "best" treatment as soon as possible which I can't give.
Wish I could.