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My newly adopted dog is sick, lethargic, and trembling. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 7 years and 1 month old | 12 lbs

My newly adopted dog had a WBC count nearly double the norm ten days ago. He’s been on Clavamox and a cough medicine since. Now he won’t eat much, he sleeps a lot, and he trembles often. His cough is better but he still seems ill. He’s around 7 or 8 and a Maltese mix. What could it be?

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on February 7th, 2018

Poor Walter. Unfortunately, there are several things that can cause an elevated WBC. An upper respiratory infection or pneumonia certainly cause this, but so can any type of infection else where. I would first want to have his WBC rechecked to see if there has been any improvement since starting the meds. I would also talk to your vet to see if they ran a chemistry to look at him liver and kidney values. Just make sure you let your vet know that he isn't what you would consider normal. If everything is looking better, his change in behavior may just be part of him adjusting to the new living area and being away from the previous living arrangements. Any change in a dog's life can cause them to stress and become anxious and/or lethargic. I hope this helps and he starts to warm up to his new forever home.

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