10 Reasons Why Your Old Dog Losing Weight Rapidly With Solution

10 Reasons Why Your Old Dog Losing Weight Rapidly With Solution

Old Dog Losing Weight Rapidly

Older dogs may lose weight slowly and subtly or suddenly and visibly. In any case, it's critical to identify the cause of your Old Dog Losing Weight if you have one. This is due to the possibility that abrupt weight loss is a sign of a more significant underlying health issue.


Chances of an Old Dog Losing Weight promptly resolving the problem and preserving your elderly friend's quality of life in his latter years increase the sooner you identify what's causing the weight loss.


Reasons For Old Dog Losing Weight

The following are the main reasons Old Dog Losing Weight:

  • Dehydration is a common cause of your old dog losing weight.
  • Dry gums
  • Lethargy
  • Recessed eyes
  • Skin elasticity loss
  • Reduced urination
  • Dark faeces
  • Heart Disease
  • Food Issues


10 Reasons Why Your Old Dog Losing Weight Rapidly

Here are 10 Reasons Why Your Old Dog Losing Weight Rapidly.


1. Dehydration, a common reason for your old dog losing weight

  • In senior dogs, the ageing process can result in general fluid loss and weight reduction.
  • This is typical, but it necessitates that you give Fido enough fresh water each day.
  • By mixing low-sodium broth with his kibble, you can enhance his hydration intake.
  • Mixing some water with the dry kibble can also help because canned dog food (wet) has far more water per cup than dry food.
  • This method is also frequently used to help senior dogs whose senses of smell or taste are waning, who have dental problems, or who have developed finicky eating habits eat more.
  • Dehydration can be brought on by diseases that plague older dogs, so have Fido checked out by your veterinarian to rule out any underlying health issues.


2. Dental Issues

Sometimes something as basic as cracked or decayed teeth, gingivitis, or gum disease can lead to weight loss in elderly dogs. There are even more severe oral conditions including tumours. As soon as possible, have your dog's mouth examined by your veterinarian.


Dental issues have the following symptoms ;

  • Excessive salivation
  • Eating and chewing challenges
  • Poor breath
  • Bleeding or swelling


3. Diabetes

If you see your old dog losing weight rapidly and you observe;

  • Extreme thirst
  • Frequent urination
  • Higher appetite
  • Lethargy
  • UTIs that recur frequently


The potential cause is diabetes;

  • An elderly dog may lose weight due to diabetes since it prevents his body from utilising glucose as normally would provide energy.
  • His body then attempts to turn protein or fat into energy in its place.
  • This is completely ineffective; Fido will quickly exhaust any reserves he may have, and no matter how much food he consumes, his body will be unable to keep up, causing him to continue losing weight.


4. Cancer

If you see a decrease in weight and observe;

  • A diminished appetite
  • Sudden lassitude
  • Uncommon bleeding
  • Swelling, lumps, or bumps
  • Enlarged abdomen
  • Lameness or limping
  • An unusual amount or frequency of urinating


Then a potential cause for your old dog losing weight is cancer.

  • One of those illnesses that can be challenging to identify only based on outward signs is cancer.
  • There are numerous distinct varieties of cancer, and some of them don't manifest any signs until they have spread and progressed.
  • However, you are in the best position to spot any potentially very subtle changes that could be warning signs because you know your senior dog better than anyone.
  • If Fido exhibits one or more of the aforementioned symptoms, do not immediately assume that he has cancer.
  • Instead, have your veterinarian give him a complete examination and discuss anything you believe may be pertinent.


5. Gallbladder or liver illness

If you see a decrease in weight and;

  • A diminished appetite
  • Lethargy
  • Thirst
  • Diarrhoea
  • Fever
  • Panting, Pacing, Drooling
  • Pain
  • Yellow or pale gums
  • Skin and eye yellowing


A potential reason for your old dog losing weight is; Liver illness or a gallbladder condition

  • One of the very minor symptoms of canine liver disease is abrupt weight loss.
  • An issue with the liver or gallbladder is frequently indicated by the gums or skin turning yellow (jaundice).
  • Again, don't freak out and assume that Fido's liver is the cause of all of these symptoms because some of them could indicate other digestive issues.
  • Correct diagnosis can only be made by your veterinarian.


6. Kidney Disease

If you see a decrease in weight and;

  • Heightened thirst
  • Frequently urinating (may contain blood)
  • Vomiting
  • Reduced appetite
  • White gums
  • Depression or sluggishness


Then a potential cause for your old dog losing weight is kidney disease.

  • Major organs stop functioning as well as they once did as a dog ages.
  • The onset of renal disease can be so gradual that it goes unnoticed until the kidneys begin to fail.
  • Since the kidneys are capable of repairing themselves up to around 70% of the time, by the time symptoms manifest, the disease has frequently advanced considerably.
  • This is an additional reason to be extremely vigilant about keeping an eye on Fido's general health and to get assistance if you detect weight loss in elderly dogs, particularly if it is accompanied by any other symptoms of sickness.
  • Any issue's prognosis is improved by early diagnosis!


7. Heart Disease

If you see your old dog losing weight and the following symptoms;

  • A persistent cough
  • Tiredness
  • Intolerance to exercise
  • Panting
  • Abnormal heartbeat
  • Restlessness


The potential cause is a heart condition

  • Early warning signals of heart disease in dogs can be subtle, and it's common to mistake them for the natural slowing down of ageing.
  • But as with other disorders, it is best to have a diagnosis as soon as possible.
  • If detected early, many cardiac diseases can be treated with a mix of medicine and lifestyle modifications.


8. Hip Arthritis or Lower Back Pain

If you see your old dog

  • Losing weight
  • Lameness
  • Foot rubbing


The potential reason is hip arthritis or lower back conditions like spondylosis

  • Decreased muscle mass might result from lower back and hip problems that make it difficult to walk normally in the rear legs.
  • Given that the lower back and hips are the most frequently affected body parts by age-related orthopaedic problems, it's usual to see an aged dog with a rather fat front end but slim hindquarters.
  • Talk to your veterinarians about lifestyle management if you are aware that your dog has an extended back or hip dysplasia to prevent them from progressing to degenerative orthopaedic diseases.


9. Food Issues Also Cause Your Old Dog Losing Weight

  • Some dogs are fussy eaters that have trouble adjusting to dietary changes.
  • A finicky dog may notice and reject the weird new tastes and scents even if their kibble manufacturer has only made minor changes to the recipe.
  • Dogs who are under stress may also become food intolerant.
  • The submissive dog can be unable to eat during mealtimes, for instance, if you bring a new pet home or if you have an aggressive dog that eats close by.
  • The tap water may taste different than the tap water at your previous location if you recently moved.
  • When you add water to your dog's kibble to moisten it, your dog might not want to eat since the water has a different flavour.


10. Parasites

  • Thanks to a rising number of pets receiving monthly prophylaxis against intestinal parasites and heartworm, parasitic weight loss in dogs is far less common than it was in earlier years.
  • It would be ideal if you kept in mind that not all anti-worm remedies are created equal.
  • There aren't many items specifically made to kill whipworms.
  • By directly consuming whipworm eggs from the environment, such as contaminated water or soil, pets can become infected with the parasite.


Signs of Old Dog Losing Weight

The following are some signs of canine intestinal illness to look out for that cause your old dog losing weight problem.

  • Weight Loss
  • Vomiting (Persistent or intermittent)
  • Diarrhoea
  • Soft stools
  • Diminished hunger


A vet typically has to examine the Old Dog Losing Weight problems to diagnose intestinal parasites. Depending on the type of parasite in your dog's system, the veterinarian will inspect your dog's excrement for eggs or other parasite life stages for Old Dog Losing Weight.


A broad-spectrum dewormer and a monthly prophylactic medicine are typically used to treat intestinal parasites. This prevents reinfection.



Unexpected weight loss in dogs can be a sign of a more serious problem or it could just be that they are eating less and moving more than usual. You should be concerned if your dog loses more than 10% of its entire body weight in a short amount of time without any obvious external causes.


You should monitor your dog's weight since, like any other body change, it is frequently a sign of health problems, just like it is for humans. In this article are 10 common reasons why dogs lose weight quickly that you should be aware of Old Dog Losing Weight problems.



  • Old Dog Losing Weight: Our Veterinarians Share What To Do [1].
  • 6 Causes Of Sudden Old Dog Losing Weight in Dogs, and How to Maintain a Healthy Weight [2].


If you’re adding a dog or have adopted a new puppy or any pet to your family, our articles will help you to find answers to Old Dog Losing Weight. Visit Drlogy Pet for detailed information on the pet care domain. You can find more articles about Old Dog Losing Weight on our page.


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Dog Weight FAQ

Why do dogs lose weight as they age, is this normal?

Yes, your dog's metabolic rate does fluctuate as it ages. Actually, mature dogs require 20% fewer calories to maintain their weight than do younger canines. Because it will have less fat and fewer calories as your dog matures, you should feed them dog food that is specifically developed for senior dogs.

How do I know that my cat is too thin?

A visit to the doctor is the best approach to determine whether your dog is excessively slim. The bodily condition score of your dog can be evaluated by your vet. The World Small Animal Veterinary Association recommends a body conditioning score of 4 or 5 for a healthy dog weight.

Does Walking help dogs to lose weight?

Yes, it is crucial to walk your dog in order to assist them lose weight in addition to the food modifications suggested by your doctor. Try to take your dog for at least 30 minutes of daily walks. If your dog is really overweight so for old dog losing weight, you should walk them slowly and pay attention to their breathing for clues. 

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