You take him/her to a well puppy vet appointment and the vet will be able to give you a good idea based on its teeth. Here is an article that talks about how the vet makes an educated guess: http://www.dogster.com/lifestyle/how-can-you-tell-how-old-a-dog-puppy-is-age-determine-ask-vet But really – every puppy should see a vet within a few days (3 at most) of arriving at your home. There are shots the puppy needs to stay healthy, the vet can give you an idea of age, answer questions about diet, tell you if the puppy is healthy or if you have problems brewing. So set up the appointment… Read more »
You take him/her to a well puppy vet appointment and the vet will be able to give you a good idea based on its teeth. Here is an article that talks about how the vet makes an educated guess: http://www.dogster.com/lifestyle/how-can-you-tell-how-old-a-dog-puppy-is-age-determine-ask-vet But really – every puppy should see a vet within a few days (3 at most) of arriving at your home. There are shots the puppy needs to stay healthy, the vet can give you an idea of age, answer questions about diet, tell you if the puppy is healthy or if you have problems brewing. So set up the appointment… Read more »