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Large breed puppy food: When to switch & calcium levels?

Updated On September 23rd, 2025

Pet's info: Dog | American Staffordshire Terrier | Male | neutered | 11 months and 23 days old | 74 lbs

At what age are American Staffordshire terrier considered an adult? I've heard that any dog with an adult weight of 50 lbs is a large breed and should be on puppy food. Should I feed him puppy food until two years? Also what is the recommended calcium level for them? Because I know my lab puppy needs a low calcium diet for his bone growth and was wondering if it was the same for all large breeds. I currently feed Otis Victor hi pro and it has 1.72 calcium and 30% protein.

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on March 3rd, 2018

Most larger breed dogs physically mature between 12 and 16 months of age. It will take up to 2 years for him to mature mentally and socially. Giant breeds take even longer, smaller breeds mature sooner. It is generally recommended to transition to an adult diet at around 1 year of age since a majority of dogs will be at or very near adult size by this age. Feeding a puppy diet beyond may predispose a dog to obesity and orthopedic issues. The calcium level in the current diet is fine for Otis. As he nears adulthood, it can be decreased to 1.5%. As long as he is getting a balanced diet, he should be fine. Studies have shown that a low calcium diet have no effect on the incidence of hip dysplasia and other orthopedic abnormalities in growing dogs. A balanced diet and one with an appropriate calcium:phosphorous ratio is much more important and beneficial. You can read more here: http://www.peteducation.com/article.cfm?c=2+1659&aid=652

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