My puppy had diarrhea yesterday and today I gave him his parvo and dewormer medicine. Today he is very lethargic and still has diarrhea. He finally pooped out a worm and was very happy and energetic. And then he fell asleep. He just woke up again and he is lethargic and energy is low again. Is this most likely because of worms or should I be worried? Pet's info: Dog | American Pit Bull Terrier | Male | unneutered | 1 month and 10 days old | 5 lbs

Hi, thank you for using Petco Pet Education Center, formerly Petcoach! It is difficult to say whether Tucker's lethargy is due to illness or from the vaccine. When puppies his age are lethargic, have vomiting, and/or are having diarrhea, I always worry about the possibility they have parvo. Since Tucker has two of the three, I would highly recommend having him examined by a veterinarian and having a parvo test run as well as a fecal examination as soon as possible. The parasites could also be the culprit, but even if he doesn't have parvo, it is better to check and know for sure. Additionally, this will give the doctor a chance to give Tucker some supportive care, if needed, to help him through his illness. Hope this helps!

Poor Lyla! Diarrhea and vomiting could be caused by toxin ingestion, parasites, change in diet, infectious viral diseases such as parvovirus, blockage in the gastrointestinal tract caused by ingestion of a foreign body, or a mass/growth in the gastrointestinal tract. Please make an appointment to have Lyla seen by a veterinarian as soon as possible, as severe vomiting and diarrhea can lead to dehydration, and can be dangerous if left untreated. I recommend you take Lyla in to the vet, and take in a fecal sample from Lyla when you go. Your vet will likely want to test the sample to see what kind of parasites Lyla may be dealing with so that they can be treated for accordingly.