My puppy has worms, diarrhea, not eating or drinking. What to do?

Olaf is very young and puppies can really deteriorate quickly when they don't feel well. He really needs to be seen by a veterinarian as soon as possible to determine the extent of the problem. If it is all due to intestinal parasites, your vet can do a fecal test to determine how many types of worms he has and get the appropriate medication for him. He may have other issues, he may benefit from a special high calorie prescription food for a short time to build him back up.

Ideally he should be seen by a vet to stabilise his condition and correct dehydration as well as supplemental feeding and a full health check to rule out additional illnesses reducing his appetite. Consider surrendering him to your local shelter to get him the best care. In the meantime an oral worm dose carefully dosed for his weight from your vets office or pet store, pedialyte and a mousse textured high calorie recovery or puppy food is recommended

First of all if you have found worms in his feces, that could be the reason for the symptoms, you should get him dewormed first thing. if deworming him does not solve the problem you will need to take him to the vet as he may be suffering from a bacterial/viral infection.

Poor pups. While a heavy parasite load can cause severe GI upset, and anemia which can cause a pup to become extremely lethargic, have bloody diarrhea, etc, I would also want to rule out underlying illnesses as a possibility. It would be best to bring them to a vet ASAP especially if they are lethargic or unable to keep any food or water down as puppies can quickly become very dehydrated. They may also need supportive care such as an IV or injected medications if they are very ill from the parasites or other causes. You can try continuing to offer water, or rubbing a little honey on their gums for energy until you can get to the vet, however due to the severity of symptoms it would be best to seek emergency care.

Apparently the earthworm protein is not compatible with your dog's digestion. I suggest you take him off all food for 12 hours and then feed him boiled white rice with boiled white boneless chicken in small quantities over several feeds a day. Do this for 2 days, then slowly transition back to his normal dog food over two or three days. By then the diarrhea should have stopped. Make sure he has plenty of water available at all times. Should he deteriorate or should the diarrhea get bloody, you will need to take your dog to a vet for an exam and treatment,

That sounds like the correct dose of pyrantel. I don't know if Billy is not eating because of taking the pyrantel or not. Some diarrhea while treating for worms is expected. Unless the diarrhea is extremely water I would not overly worried about dehydration especially since he is drinking water. I would, however, be worried about a puppy that doesn't eat for longer than 48 hours. I suggest you call your vet for more advice.

If your puppy is not eating at all and this began within the last day or two, I would be very concerned about a serious medical problem - if this is the case, you should get him to a vet right away. Common causes of not eating in puppies would include parvo or intestinal obstruction, but almost any serious illness could cause not eating as a symptom so it would be hard to know the cause without an exam and possibly some blood work or x-rays. If this problem has been going on for a while and your pup is acting fairly normal otherwise, then yes - it's possible that he could have worms, or he may be a picky eater who would do better with a different diet. You could try deworming him with a dewormer labeled for dogs such as Panacur - you can get this over the counter at many pet stores, just follow the dosing instructions on the label for your puppy's weight. You may also want to try a different brand or flavor of puppy chow, or mix some canned puppy food in with his dry food to see if this helps to tempt his appetite. If this doesn't seem to help, then I would recommend having him seen by a vet to find out if there is some other reason for his poor appetite.