Puppy feeding and growth
How do I know if my puppy is underweight?
Last updated 23 September 2026 · How we write and check this
Short answer
Signs include ribs, spine, and hip bones that are easily visible rather than just felt, a tucked in belly with no fat cover, low energy, and a dull coat. Compare growth against typical curves for the breed, since a genuinely underweight puppy will usually track below expected growth for its age.
What underweight looks and feels like
A healthy puppy's ribs should be easy to feel with light pressure but not obviously visible. A puppy where ribs, spine, or hip bones are clearly visible even at a glance, without much fat or muscle cover, is showing physical signs of being underweight rather than just naturally lean.
Other clues beyond body shape
Low energy, a dull or thin looking coat, and slower than expected growth on the weight chart together paint a clearer picture than any single sign alone. An underweight puppy is often also less interested in play than littermates or than it was previously.
What to do next
Recalculate the daily food amount against current weight and increase gradually, but also arrange a vet check, since underweight puppies sometimes have an underlying cause like intestinal parasites rather than simply not being fed enough.
Key takeaways
- Visible ribs, spine, or hip bones, not just easily felt ones, suggest a puppy is underweight.
- Low energy and a dull coat often accompany a genuinely underweight puppy.
- Compare growth against typical breed curves rather than judging weight in isolation.
- Arrange a vet check alongside increasing food, since parasites are a common underlying cause.