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Why is my new puppy throwing up, having diarrhea, and not eating?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 1 month and 30 days old | 1.5 lbs

My 8 week old teacup Morkie has been having a hard time adjusting to our home. I can’t tell if she is just anxious or what’s going on. She throws up a bit and has diarrhea.. then loses her appetite by her third feeding. She is also eating Royal Canine wet puppy food, so i’m not sure if that could be the problem. She also has separation issues and tends to cry a lot, which is okay but very difficult to train her to be alone. She has an appointment in a few days but i just can’t wait and need answ

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on June 6th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Nala! The crying is normal for an 8 week old puppy in a new home. The vomiting and diarrhea is not normal and is not anxiety. Possible causes of vomiting and diarrhea are: intestinal parasites, viral (especially parvo) or bacterial infections, dietary indiscretion, reaction to new food/treats or a food allergy. Nala is very young and small. Not eating well combined with vomiting and diarrhea predisposes her to dehydration and low blood sugar risks. I highly recommend having her seen today and bring a stool sample. Also bring any paper work indicating recent vaccinations and dewormings. I wish you and Nala the best!

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