How to Tell How Old a Puppy Is (Ways to Know)

There are several ways to tell how old a puppy is. For instance, if you look for the size, shape, or number of teeth, it is a good sign of young age. Besides, young dogs tend to be more active and exhibit more enthusiasm. You can also pay attention to the behavior patterns of young puppies.

What to Look for When Trying to Estimate a Puppy’s Age

Deciduous incisors

The erupting deciduous incisors of a puppy help to determine the age of the animal. These teeth are smaller than the permanent incisors and are present on both sides of the jaw. They erupt in pairs in a puppy’s mouth at three to four weeks of age. The next stage in the puppy’s development is the deciduous canines, which are larger and pointier. Normally, a puppy’s canines erupt between five and six weeks.

It’s important to keep in mind that retained deciduous teeth are bad for your puppy’s health. These teeth cause the gum to leak and promote the spread of oral bacteria. Furthermore, the trapped debris can lead to accelerated periodontal disease. This can lead to pain and discomfort in the puppy, and even lead to early loss of adult teeth. It can also result in infection in the bloodstream, which can affect the rest of the body.

Because deciduous teeth are not permanent, they must be removed. A dog that has retained deciduous teeth may have a serious malocclusion. The adult teeth erupt directly below the deciduous teeth and stimulate the resorption of the deciduous teeth’s roots. This resorption process is performed by the Odontoclasts. In most cases, deciduous teeth fall out of the mouth as the adult teeth emerge.

Behavior patterns

A dog’s behavior pattern will often indicate its age. A dog that is afraid of strangers will often exhibit the increased intensity and become more reactive. Many people think that a dog “just snapped” because he was scared of something or because it is overtired, but this is rarely the case. Often, a dog will display these behavior patterns after a series of encounters.

Puppies begin to develop social skills and begin exploring their environment when they are between three and five weeks old. They also start to explore their pack hierarchy and begin to play with other puppies. They also start to understand how to interact with their mother and other dogs.

Another behavioral pattern to look for is aggression. Aggression will make your dog growl and bite, and you should try to figure out what is causing this behavior before starting any training. If your puppy shows signs of aggression, you may need to start training your puppy to learn not to bite people and objects.

At eight weeks, puppies can begin to remember events that frighten them. For instance, the fear of strangers can start when the puppy encounters a cat for the first time. If your puppy is afraid of strangers, this is a sign that they haven’t had any positive experiences yet. It is also a good idea to begin manners training during this time.


To determine a puppy’s age, check its teeth. They can give you clues to its age, including the type of teeth and the extent of wear. You can also notice whether it has any dental tartar buildup. However, you should note that teeth can vary between two individuals from the same litter.

As a rule of thumb, puppies with the most visible teeth are a year old. However, their teeth will begin to show signs of wear and tear within six to eight weeks. In addition, the back teeth will begin to accumulate tartar, which is a natural part of aging. In addition to teeth, there are other telltale signs of age that make it possible to estimate a puppy’s age.

By the time a puppy reaches seven months of age, its baby teeth should be gone. Otherwise, the adult teeth should start emerging. In addition to replacing their milk teeth, permanent teeth add four premolars and ten molars. The mouth should have at least 42 permanent teeth by this age. However, if you see two teeth in the same spot, this could mean that a puppy has a condition called periodontal disease. In addition, you should check for signs of bleeding gums and blood on toys.


You can try to guess the age of your puppy by examining its teeth, but this method is not 100% accurate. It is better to consult with a vet or an experienced dog handler. This way, you can ensure that your puppy is as old as it should be. You can also use genetics to estimate the age of your puppy.

Although the exact age of your dog may not be known to you, a veterinarian will be able to estimate the age by taking into consideration several factors, such as the color of the fur and the teeth. The veterinarian will use this information to make an educated guess, but you will know your dog better than anyone else. Once you know the age of your puppy, you can make a more appropriate care decision for them.

If your puppy is two weeks old or older, then he/she should have wide, open eyes. If their eyes are closed, the puppy is very young. This is because the eyes develop slowly. Puppies’ eyesight will improve by eight weeks. If your puppy still has blurry or cloudy vision, the pup is less than 8 weeks old.

Many people do not realize how much puppies change during this time. You can spot these differences in fur coloring and muscle tone in pictures from early on. Generally, a puppy’s size will increase by about one centimeter per month, but it can take longer for larger breeds.


The easiest way to determine the age of a puppy is by looking at its teeth. If the puppy’s teeth are visible, you can assume that it is between 30 and 45 days old. If the teeth are not visible, you can assume that the puppy is older, but the exact age is unknown. To be sure, take the puppy to a veterinarian and have his or her teeth checked. A puppy will have all of its adult teeth when he is five to seven months old.

Read Also: How to Socialize an Adult Dog

Although the teeth are the most reliable way to determine a puppy’s age, this method is not always accurate. If you have doubts, consult a veterinarian or an experienced dog handler. Make sure that the person has extensive knowledge of dog behavior. You can also check Kirsten’s book, The Pet Handbook. The advice in her book is based on her own experiences and has been widely acclaimed by readers.

When you are looking for a dog, it is best to adopt a puppy. This is much easier than adopting an adult. In addition, puppies are much easier to detect than older dogs. However, even adults require a bit of detective work. Many shelter dogs don’t have a detailed medical history, and you may not know much about them. Another way to tell a puppy’s age is by observing his or her eyes. If the puppy has eyes that are open but cloudy, he or she is probably under eight weeks old. Ideally, your puppy’s eyes will be wide open by two weeks old.

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