Puppy feeding and growth
Should I keep feeding puppy food after my puppy reaches adult height?
Last updated 23 September 2026 · How we write and check this
Short answer
Reaching adult height is not the same as finishing growth, especially for large and giant breeds, which often keep filling out chest and muscle mass for months after height stabilizes. Continue puppy food until weight has also stabilized, not just height.
Height and weight do not finish together
Many dogs, particularly larger breeds, stop gaining height at the shoulder noticeably before they stop adding overall body mass, so a dog that looks tall and fully sized can still be several months away from actually finishing its growth in terms of muscle and frame.
Why weight is the better signal to wait for
Switching to adult food based on height alone risks cutting off the extra calories and controlled nutrient profile a still developing dog needs during this final filling out stage, which is why tracking weight until it plateaus is a more reliable signal than visual height alone.
What to do in the meantime
Keep feeding the appropriate puppy or large breed puppy formula, recalculating the amount against current weight, until monthly weigh ins show weight has also stabilized, then begin the gradual transition to adult food over seven to ten days.
Key takeaways
- Reaching adult height does not mean a dog has finished growing overall.
- Large and giant breeds often keep filling out muscle and chest mass after height stabilizes.
- Weight stability, not height, is the more reliable signal to switch to adult food.
- Continue puppy food and monitor weight until it plateaus before transitioning.