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Puppy's age: Who to believe, vet or birth certificate? What to feed?

Updated on September 23rd, 2025

Pet's info: Dog | Golden Retriever | Male | unneutered | 3 months and 2 days old | 6 lbs

My puppy is more than three months according to his burth certificate. But vet says he’s nearly two and a half. Whom should i believe? And what should i feed him? Still a puppy starter?

1 Answer

Most Helpful Answer

Daniel Fonza, DVM

Answered By Daniel Fonza, DVM

Veterinarian

Published on May 4th, 2018

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. If you have a birth certificate with his date of birth and this is a known date by the breeder, than this should be accurate. You can contact the breeder directly to make sure this date is correct. I would still feed a puppy food up until 12 months of age. Science Diet, Royal Canin, Natural Balance or Purina One. I hope this helps guide you in the right direction. Please let me know if you have any other questions or concerns and I would be more than happy to help you further. Please remember to rate this answer as helpful or not. Thank you!
Vote Icon1Pet Parents found this answer helpful

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