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Why is my 10-month-old puppy not eating and has a neck lump?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 10 months and 2 days old | 17 lbs

there is a movable hard solid thing (suspecting it is a tumour) on the back side near the neck on my dog. It is only 10 months old. She has no apeptides in two days. she doesn't seems very tired but not as energetic as before.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 19th, 2017

This lump on Siu q could be a benign tumor, a cyst, an abscess, or a lipoma. It would be rare for such a young dog to have a malignant tumor, but it is possible. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would take Siu q into the vet today or tomorrow to have this lump examined and diagnosed so it can be treated as needed.

As for the lack of appetite and lethargy, those are very general signs of illness in dogs, and it could be caused by systemic illness, infection, inflammation, or injury. Because Siu q is going to see the vet for this lump, I would have a health check done on her as well to diagnose the cause of the lethargy and lack of appetite.
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