How to Tell How Old Your Jackweenie Dog Is?

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If you got your dog from a breeder, you have your dog’s exact age. However, this may not be the case if you adopt your dog from a shelter; it can be difficult to know how old it is. This brings you to how to tell how old your Jack Russell terrier and a Dachshund mix dog are?

How to Tell How Old Your Jackweenie is?

In your quest to find out the age of your Jackweenie or Jackshund, as the mix between a Jack Russell and Dachshund is called, you will use the methods explained below.

An image of a Dachshund


Examining your furry friend’s teeth will give you an idea of how old it is. You will know approximately how old it is because of how grown its teeth are. A Jackweenie is a small dog, and most stop being considered puppies when they are between 9 to 12 months. When you observe the teeth, you are likely to come to the following conclusions:

  • 2 – 4 weeks: A this age, your Jackweenie does not have any teeth.
  • 8 weeks: It has all its milk teeth, also called deciduous teeth.
  • 5-6 months: The milk teeth have fallen off, and the permanent teeth start coming in. 
  • Eight months: Your dog has all the permanent teeth at this age. They are very clean and white.
  • 1 year: The teeth are still white; however, the four incisors at the bottom and top jaws have ridges.
  • 3-5 years: At three years, the back teeth have started showing signs of tartar and yellowing, this increases as it gets older. The ridges have also started to wear out. They may experience dental problems such as gingivitis.
  • 5-10 years: During these years, the ridges on the incisors have worn off and are completely smooth. If the dog does not receive any form of dental care during these years, the tartar build-up is going to get worse. The teeth also start to fall off.
  • 10+ years: If at this age it has not received any dental care, its roots are exposed, some teeth are missing, and others are loose. The probability of it having gingivitis is very high, and a lot of build-ups has accumulated on the teeth.

You must realize that your Jackshund’s teeth will age much quicker because it is a small dog. Other factors such as the type of food your dog eats and if it likes to chew on objects such as its toys will affect how the teeth age. Soft food such as fresh and home-cooked diets will age the teeth faster.


As your Jackshund ages, its lens protein starts hardening, making it appear cloudy. It may also start producing discharge. This is an indicator of aging, and it starts to show from about six to eight years old. While it may be expected, it is better to consult your vet so they can look at it and say if it is normal or not.

This cloudiness of the eyes is a condition called Lenticular Sclerosis. It is very different from Cataracts, which look milky white and affects vision which is not the case with Lenticular Sclerosis. Younger dogs have much clearer eyes; the clearer the eyes are, the younger the dog is.

Fur Color

In the same way, human hair starts greying when they get older; dog fur also starts becoming great as it gets older. It greys at the muzzle and starts with a few patches. If your Jackweenie has grey patches on the muzzle, it is between five and seven years old. It is more than 10 years old if it is fully grey.

After the muzzle, other parts that you will notice the fur color change include the area around its eyes and chest. If your dog has white patches, this method may not work for you. Some dogs do not experience greying of fur, which may make you think they are young when they are older.

Other dogs may also start greying early because of stress and anxiety. The type of shampoo you use to bathe it may also prevent the grey fur from showing when it is supposed to and make it show up much later.  However, if its eyes and teeth indicate that it is younger and still has grey hair, it is probably young and is greying early because of stress.

A close-up of image of a Dachshund mix puppy

Activity Level

One of the first things you will notice if your dog is older is its activity level. It is not able to take long walks and gets tired more quickly even when you are doing activities that it enjoyed in the past, such as playing fetch. Your Jackweenie may also be spending most of its time sleeping.

Its metabolism is also decreasing, hence affecting its energy levels. The muscles have also started to lose mass, making them weaker and unable to handle many activities that require them to be active for a long time. This does not mean it has no desire to play or go on walks with you; it can still do that for a short time.

As it gets older, it may develop arthritis that makes running and walking for a long time painful. However, because of its parent, the Jack Russell terrier, it is already predisposed to arthritis. It has no cure, and you should seek help and give extra care to your dog when you notice any signs of disease.

Muscle Tone

A young, healthy Jackshund has minimal fat, and its muscle tone is visible. If the dog is obese, it may be a little harder to notice this. As it ages, it starts to lose muscle tone and grows fat.

When you pet it and it is younger, you do not feel any bumps under its skin. However, as it grows older, you feel some bumps. These bumps are fatty tissues and lipomas, and they are not cancerous. To be on the safe side, it is better to have a vet examine them so you are sure they are not cancerous.

So, if you feel your dog and there are bumps under the skin, it is older. The older it gets, the more lumps it has. These lumps start accumulating because of reduced activity levels; the dog is not as active as it was before and is storing its fats under the skin. They start developing at approximately six to eight years.

Blood Panel

You can be able to perform all the methods above at home. If you need a much more accurate method, or you want to narrow down the estimate from the above methods, have your vet give your Jackweenie a blood panel.

A blood panel determines how well internal body organs such as kidneys and the liver perform their functions. The organs work differently depending on how old the dog is. Although the panel will not be able to give an exact estimate, they will be able to give an accurate range.

Getting a blood panel done also lets you know how healthy your dog is. If it is not healthy, the condition will be discovered at that time. This will give you a chance to ensure it receives the appropriate medical attention as soon as possible.


Knowing how old your dog is will give you an opportunity to provide it with the best care possible. You will know the appropriate food for its age, the vaccinations it needs to get, and any other services it may need. You can combine the methods above to get an approximate age closer to its real age.