Puppy feeding and growth
How much should a 9 month old puppy eat?
Last updated 23 September 2026 · How we write and check this
Short answer
Small breeds are typically at their adult weight and eating an adult amount by nine months. Medium breeds are usually within a couple of months of adult size. Large breeds still have several months of growth ahead, and giant breeds are often still under half their eventual adult weight at this age.
Small breeds: watch for a plateau
If a small breed puppy's weight has stayed flat for three or four consecutive weekly checks, that is a good sign it has reached, or is very close to, its adult size. This is the point to compare portions against an adult feeding chart for the same food rather than continuing to increase amounts.
Medium breeds: fine tuning, not big jumps
A medium breed puppy at nine months is usually adding smaller increments each week compared with a few months earlier. Portion changes at this stage tend to be modest, often just 5 to 10 percent adjustments rather than the larger jumps needed during the fast growth months.
Large and giant breeds: stay the course
Large breed puppies typically keep growing until somewhere between 12 and 18 months, and giant breeds until 18 to 24 months, so a nine month old large or giant breed dog is often still mid growth and should stay on a large breed or giant breed appropriate puppy formula for some time yet.
Key takeaways
- Small breed puppies are often at adult weight by nine months.
- Medium breeds usually need only small portion adjustments now rather than large ones.
- Large breeds still have several months of growth left at nine months.
- Giant breeds are frequently still under half their eventual adult weight at this age.