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Why is my puppy lethargic, shaking head, gagging, and acting strange?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 3 months and 28 days old | 5 lbs

My puppy is about 5-6 months old and today he started acting funny, his bark sounds like a cry his head is shaking ( like a bobble head toy) he's lethargic while sleeping his tounge hangs out ( not normally) ,gagging won't go down stairs, white foamy stuff in urine, completely different behavior.

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on August 20th, 2018

All these signs are very concerning and point to a possible viral infection or metabolic disease. You need to take your dog to a veterinarian or PetER right away as he may be having a serious infection that needs to be tended to. Distemper comes to mind, a liver shunt and/or meningitis.

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