My name is ***** ***** I’ve been involved professionally with dogs in the health and behavioral fields for over 18 years. It will be my pleasure to work with you today.
Parvovirus has no real cure. All you can do is treat the symptoms as it is the symptoms that lead to dehydration and death. Some experts would recommend pepto bismol but it is related to aspirin which has been known to cause stomach issues so I would not feed this. Zinc is also toxic to dogs. Pedialyte is a good choice but if you can get some food to stay down, that works better.
Your best bet is to get a new drug tamiflu. Tamiflu is a new treatment for parvovirus but it has to be given within the first 48 hours of the symptoms appearing (loss of appetite). With this treatment given in a timely manner, I've had 100% recovery with numerous litters and puppies having parvo. For this reason, I urge you to have the puppy seen immediately and if it is indeed parvo, ask about Tamiflu and if the doctor doesn't know about it, insist they look up the information. You can read about it here:
If your dogs are already showing symptoms of parvovirus, then vaccination at this point is not going to help. It takes multiple vaccinations to trigger the immune response and even then about 7 days after vaccination before it is effective. The vets I work with would not vaccinate a sick puppy at all. Since you did have the pups seen at your vet, call them and ask for a prescription of tamiflu. It could really help prevent any pups not showing symptoms from developing symptoms and help any pup that has just started showing symptoms.
Other than that, all I can tell you is to keep the pups warm, try and tempt them with small amounts of ground chicken and keep small amounts of fluids going in. You need to find the amount the dog can consume without triggering vomiting . Some dogs will be able to hand a tablespoon of food or liquid every hour while others may only handle a teaspoon every hour. Your aim is to keep them going until the disease runs it course. Usually if a pup makes it to day 5 or so, they have a better chance of survival. If started on tamiflu within 48 hours, the chance of survival increases greatly. I have not lost a pup to parvo since I found out about Tamiflu. I start them off on it with the positive test results and their siblings. That is your best way of treating this disease.
Tamiflu can be used at home and doesn't require the extensive in house vet treatments. Those can help but are not necessary if caught early. If caught after 48 hours, it isn't effective on that particular puppy. I wish I had better news and hope your vet will give you access to tamiflu.
I hope this information is helpful to you. If you would like any additional information or have more questions please don’t hesitate to press the reply to expert or continue conversation button so I can address any issues you still have . If you do find this helpful, please take this opportunity to rate my answer positively so I am compensated for my time.