General Observations:
* Size: A very small puppy is likely younger than a larger one, but size can vary greatly between breeds.
* Teeth: You can estimate age by examining the puppy's teeth.
* 2-3 weeks: First milk teeth erupt.
* 3-4 weeks: All milk teeth emerge.
* 4-6 months: Milk teeth start falling out.
* 6-8 months: Adult teeth are fully erupted.
* Eyes: Puppies' eyes open around 10-14 days.
* Walking: Puppies usually start walking around 3-4 weeks.
Expert Help:
* Veterinarian: A vet can estimate age by examining the puppy's teeth, bone development, and other physical characteristics. This is the most reliable method.
* Breeder: If you obtained the puppy from a breeder, they should be able to tell you the puppy's approximate age.
Important Notes:
* Accuracy Limitations: Age estimates based on physical characteristics can be inaccurate, especially if you don't know the puppy's breed.
* Puppy's History: The puppy's overall development can be affected by factors like nutrition, health, and environment.
* Ethical Considerations: If you find a stray puppy, do not attempt to determine its age yourself. Contact a local animal shelter or rescue organization for help.
Always remember: It's crucial to provide proper care for a puppy regardless of their age.