What are the causes of weight loss in dogs? The secret behind why dogs become thin

Jul 26,2025
4Min

The first reason for dog weight loss: insufficient diet

Many owners will ask how much their dogs should eat. In fact, there is no accurate answer to this. Even the recommended amount on the dog food package is only a reference standard, and we should still make judgments based on the actual situation. Some owners feed the food exactly according to the instructions on the package, but the actual situation is that these amounts may be lower than the dog's needs, so the dog may be underweight.

The second reason for dog weight loss: parasites in the body

Although some owners pay attention to the vaccine issue, they ignore the deworming work. Some owners say that their dogs eat a lot, but they just don't gain weight. This is most likely caused by internal parasites, because most of the nutrients are absorbed by parasites. Therefore, it is best for owners to regularly deworm their dogs internally and externally.

The third reason for dog weight loss: disease reasons

Dogs suffer from certain diseases that cause dogs to have a loss of appetite and be unable to eat, such as oral inflammation, digestive tract inflammation, digestive tract obstruction, and indigestion. Systemic disorders, liver and pancreatic diseases, etc. If the dog's digestive system is not good, nutrients cannot be well absorbed and utilized by the body, which will lead to weight loss. In this case, the best solution for the owner is to take the dog to the hospital for examination and treatment, and to prescribe the right medicine to treat the disease.

The fourth reason for dog weight loss: nutrient utilization disorder

Although the food the dog eats is very good and the nutrients can be absorbed well, due to abnormal liver function, the dog cannot absorb nutrients well. Utilize absorbed nutrients. This means that nutrients are absorbed in vain, but the body cannot use them, which will also cause the dog to be thin.

The fifth reason for dog weight loss: metabolic surge

Dogs may consume far more nutrients than they consume every day due to their own metabolic surge. There are many situations in which metabolism surges, such as extreme physical exertion caused by acute and chronic diseases, huge exertion caused by pregnancy and childbirth and nursing puppies, huge consumption caused by severe trauma, etc.

The sixth reason why dogs are emaciated: mental problems

There is also a very small probability that dogs are emaciated due to their own mental conditions. If a dog is in a state of mental stress and depression for a long time, it is easy for him to become anorexic and lose weight. This situation mostly occurs in small dogs and dogs that are extremely dependent and loyal to their owners.
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