Grooming and coat
When does a puppy's coat change to an adult coat?
Last updated 23 September 2026 · How we write and check this
Short answer
Most breeds begin losing their soft puppy coat and growing in a coarser adult texture between four and twelve months old, with double and long coated breeds often taking closer to a year to fully finish the transition. This period tends to mat more easily than either the puppy coat or the finished adult coat alone.
Why timing varies so much by breed
Small and short coated breeds often complete the change closer to four to six months, while large, double coated, or continuously growing coated breeds can take until well past their first birthday, since the transition follows each breed's individual growth rate rather than a single fixed schedule.
Why this stage mats more easily
During the change, softer puppy hair and coarser new adult hair grow in together, and the two textures tangle with each other far more readily than either would alone, which is why many owners notice their puppy's coat suddenly needs more frequent brushing right around this period even though nothing else about their routine has changed.
Adjusting the grooming routine
Increasing brushing frequency for a few months during this transition, even temporarily going daily on breeds that will later need less, catches the extra tangling before it becomes a real problem, and settling back to the coat's normal adult schedule once the texture evens out again is usually straightforward.
Key takeaways
- The puppy to adult coat transition typically happens between four and twelve months, varying widely by breed.
- Mixed puppy and adult hair textures during this period tangle more easily than either coat alone.
- Temporarily increasing brushing frequency during the transition prevents extra matting during this stage.