Why is my 10-month-old puppy not eating and has a neck lump?
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.
Updated on September 23rd, 2025