Grooming and coat
Why does my dog's coat look dull?
Last updated 23 September 2026 · How we write and check this
Short answer
A dull coat is often linked to infrequent brushing, which stops natural oils from spreading through the hair, or a diet lacking enough good quality fat. It can also reflect the normal texture change of a coat blow. A dull coat that comes with hair loss or skin changes is worth a vet visit.
The everyday, fixable causes
Brushing distributes the natural oils produced by the skin along the length of each hair, and a coat that goes weeks without brushing often looks flatter and less glossy simply because those oils stay concentrated near the skin rather than reaching the tips. Increasing brushing to three or four times a week for a few weeks often brings back visible shine.
Diet's role in coat quality
A diet with insufficient fat content, or one that does not suit a particular dog well, can show up first as a duller, coarser coat before any other visible sign. A complete, good quality diet with adequate omega fatty acids generally supports a glossier coat over a period of six to eight weeks of consistent feeding.
When dullness points to something more
A coat that stays dull despite regular brushing and a good diet, especially alongside hair thinning, flaking skin, or a change in appetite or energy, can point to an underlying health issue, and this combination is worth discussing with a vet rather than assuming it is purely cosmetic.
Key takeaways
- Infrequent brushing often leaves a coat looking duller because oils stay concentrated near the skin.
- A diet low in quality fat can show up first as dullness before other signs appear.
- Dullness combined with hair loss, flaking, or appetite changes is worth a vet visit rather than a product change.