Why is my puppy lethargic after deworming for worms?

Question

Hello, I have a Yorkshire terrier. I just got her 3 days ago. I took her to the vet yesterday at petsupermarket to get her shots. They told me she was to young but they gave her dewormer. Late last night she pooped and it was full grown worms in her poop. I know the dewormer is working. I’m just worried because she has been sleeping on and off all day. She is very lethargic today. How often is she suppose to get dewormed? The doctor told me she is 4 weeks. I’m worried about her. Thank you. Pet's info: Dog | Yorkshire Terrier | Female | unspayed | 29 days old

Vanessa Yeager DVM MPH · Accepted Answer

Hi there and thanks for posting on Petco Pet Education Center, formerly Petcoach! Yes, Khaleesi is too young to receive vaccinations. Typically vaccines are first given when the puppy is 8 weeks old. The dewormer for roundworms (if it was pyrantel) is given orally once every 2 weeks 3-4 times. Sometimes puppies that have a roundworm infection may become lethargic. Lethargy in puppies can be caused by a variety of other medical conditions as well including viral infections. If Khaleesi is lethargic, not eating, and just not herself, my best advice is to have her seen by her veterinarian for an exam just to be sure there is nothing else more concerning going on that would cause or contribute to her lethargy. I hope this helps and thank you again for posting.

Why is my puppy lethargic after deworming for worms?

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