Why is my senior dog losing weight so fast without other symptoms?

Question

I have a 16 year old Australian silky terrier, who has lost 0.5kg in 2 days, which is a large amount , since he started with being 5.7kg. I am aware that this can lead to major sicknesses, but he has shown no other symptoms, and his lifestyle has not changed. Any idea the issue? Pet's info: Dog | Silky Terrier | Male | unneutered | 12 lbs

Rodrigo Roca, DVM · Accepted Answer

Hello, this may be associated to volume/water loss or decreased intake which is the fastest contributor to weight that the body can lose/gain. I would monitor his urination and drinking habits. At 16 years old, which by the way is amazing, I would be most worried about his kidney function or an endocrine problem causing increased water loss. Also, if he isn't drinking as much, he may be running a little dry. Hope this helps.

Why is my senior dog losing weight so fast without other symptoms?

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