
Hill's Science Diet is a popular brand of dog food that has been linked to several cases of diarrhoea in dogs. While the food is formulated to meet the needs of healthy pets during various life stages, some dogs have experienced digestive issues and diarrhoea after consuming it. In some cases, the diarrhoea has been attributed to dietary intolerance, food allergies, or changes in diet. Additionally, there have been a few instances of contaminated batches, which have resulted in product recalls. While Hill's Science Diet may work for some dogs, it's important for pet owners to monitor their dogs' reactions to new food and consult with veterinarians to ensure their pets' nutritional needs are being met without causing adverse effects.
| Characteristics | Values |
|---|---|
| Common causes of diarrhea | Dietary indiscretion, abrupt dietary changes, medications, infectious agents |
| Dietary indiscretion includes | Getting into the garbage, eating people food that the dog is not accustomed to |
| Infectious agents include | Parvovirus, coronavirus, Salmonella, E. |
| Other causes | Food allergies or intolerance, garbage or spoiled food, ingestion of foreign objects, toxins or poisons |
| Hill's Science Diet | Owned by the Colgate-Palmolive Company, made in Topeka, Kansas |
| Hill's Pet Nutrition recall | January 2019, several products of their Prescription Diet and Science Diet canned dog food |
| Reason for recall | Dog food could contain too much vitamin D, which can cause toxicity symptoms in dogs |
| Customer reviews | Mixed reviews, some blame the product for the death of their pets, others say it helped with their dog's digestive issues |
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What You'll Learn

Dietary intolerance
Some dogs have experienced diarrhoea after eating Hill's Science Diet food. In one case, a dog owner observed that their puppy's diarrhoea continued for months after starting them on Science Diet prescription food, and only stopped when they switched to a premium dog food. Another dog owner reported that their dog developed diabetes and died within a few weeks of eating Science Diet Ultra Z/D prescription food for three years. However, it is unclear whether the food was the direct cause of the dog's death.
Stress or a change in diet can cause "bad bacteria" in a dog's stomach to multiply, which can lead to diarrhoea. It is important to introduce new food gradually to a dog's diet to avoid upsetting their stomach.
Some dog owners have reported that Hill's Science Diet Sensitive Stomach & Sensitive Skin Chicken Recipe Dry Dog Food helped ease their dogs' digestive problems and diarrhoea. It is recommended to consult a vet nutritionist to determine the cause of diarrhoea and rule out any food allergies.
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Abrupt dietary changes
If your dog is experiencing diarrhoea, it is important to check the feeding amount and cut out treats. Spacing out meals can also help. If your dog is still experiencing diarrhoea, adding a couple of tablespoons of cooked carrot, sweet potato, or squash to their meal can help to firm their stool.
In some cases, dietary changes may not be the cause of your dog's diarrhoea. Other potential causes include dietary intolerance, parasite infection, ingestion of foreign objects, toxins or poisons, and viral infections. It is always recommended to consult with your veterinarian if your dog is experiencing persistent or frequent diarrhoea to rule out any underlying medical conditions.
Additionally, stress can also be a factor in causing diarrhoea in dogs. Stress can disrupt the balance of bacteria in the gut, leading to an overgrowth of "bad bacteria" and resulting in digestive issues like diarrhoea.
While Hill's Science Diet has been linked to diarrhoea in some dogs, it is important to note that it has also helped improve digestive issues in others. Some dog owners have reported that switching to Hill's Science Diet Sensitive Stomach & Sensitive Skin Chicken Recipe Dry Dog Food helped ease their dogs' digestive problems and resulted in healthier stools.
It is always recommended to consult with your veterinarian before making any significant dietary changes for your dog, especially if they have sensitive stomachs or known food allergies.
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Food allergies
Management of food allergies involves strict avoidance of the allergenic food and its ingredients. Individuals with allergies must carefully check food labels and menus and inform their social circle, schools, and workplaces about their allergies. Carrying adrenaline auto-injectors, such as EpiPens, is crucial for emergency treatment, and individuals should seek immediate medical attention if they experience severe symptoms.
In the context of Hill's Science Diet, some dog owners have reported concerns about potential toxicity and links to diarrhea in their pets. While dietary changes, including the introduction of new food, can cause diarrhea, some dogs may also have food allergies or intolerances that result in gastrointestinal issues. It is important to consult with a veterinarian to determine the specific cause of diarrhea and rule out any underlying health issues.
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Parasite infection
Diarrhea in dogs can be caused by a variety of factors, including dietary intolerance, dietary changes, allergies, and parasite infections. Parasitic infections are a common cause of diarrhea in dogs and can lead to significant health issues.
One type of parasite that can cause diarrhea in dogs is intestinal parasites, such as roundworms, hookworms, and giardia. These parasites can be transmitted through direct or indirect contact with infected animals, their feces, or contaminated food or water sources. For example, giardia is a single-celled parasite that can be contracted from contaminated water or the stool of another infected dog. It can cause diarrhea, vomiting, weight loss, and poor appetite. Similarly, coccidia are another type of single-celled parasite that can lead to gastrointestinal problems, including bloody diarrhea and weight loss, especially in puppies and kittens.
Tapeworms are another common intestinal parasite in dogs, transmitted by ingesting fleas or infected intermediate hosts, such as rodents. While tapeworm infections typically cause mild symptoms, such as irritation around the anus and small white segments in the feces, they can still lead to diarrhea. Whipworms are parasites that primarily affect the large intestine of dogs, causing chronic diarrhea, weight loss, anemia, and inflammation.
The treatment for gastrointestinal parasites in dogs depends on the specific parasite and the severity of the infection. Medications such as dewormers or antibiotics may be prescribed, along with dietary changes and increased hygiene practices to prevent future infections. It is important to consult a veterinarian for proper diagnosis and treatment to ensure the health and well-being of your dog.
While Hill's Science Diet has been linked to diarrhea in some dogs, it is important to note that dietary changes, allergies, or intolerances may also be the cause. In 2019, Hill's Pet Nutrition recalled certain products due to potentially toxic levels of Vitamin D, which can cause diarrhea and other symptoms. However, it is important to consult with a veterinarian to determine the specific cause of diarrhea in your dog and rule out any underlying health issues or parasitic infections.
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Vitamin D toxicity
In late January 2019, Hill's Pet Nutrition recalled several products of their canned dog food due to concerns over potentially toxic levels of vitamin D. Vitamin D toxicity, or hypervitaminosis D, occurs when there is too much vitamin D in the body. This is usually caused by taking too much supplemental or prescription vitamin D.
Vitamin D is a fat-soluble vitamin found in various animal products, fortified foods, and is also made in the human body through exposure to the sun. It is an essential vitamin that plays a role in bone development and maintenance, as well as the nervous, musculoskeletal, and immune systems. While vitamin D toxicity is rare, it can be harmful to health, with severe cases resulting in kidney failure, abnormal heart rhythm, unsteady gait, and confusion. The main complication is hypercalcemia, which can cause vomiting, increased thirst, dehydration, and frequent urination.
Symptoms of vitamin D toxicity include a decrease in appetite, nausea, constipation, dehydration, increased thirst, frequent urination, confusion, lethargy, and fatigue. Physical exams of patients with vitamin D toxicity may show loss of skin turgor and dry mucous membranes due to dehydration, changes in mental status, and abdominal tenderness.
It is important to note that dietary changes can also cause diarrhea in dogs. Introducing new food too quickly can cause diarrhea, as can allowing a dog to eat garbage or spoiled food. Food allergies or intolerances can also cause gastrointestinal issues and diarrhea. In some cases, dietary changes can help alleviate diarrhea in dogs. For example, one dog owner reported that their dog's diarrhea stopped after switching from Hill's Science Diet to a premium dog food.
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Frequently asked questions
Yes, Hill's Science Diet has been known to cause diarrhea in some dogs.
Diarrhea in dogs can be caused by dietary indiscretion, abrupt dietary changes, medications, or infectious agents. Dietary intolerance and parasite infection are also common causes.
Some alternatives to Hill's Science Diet that have been recommended by dog owners include Royal Canin Ultamino, Purina Pro Plan Sensitive Solutions, and Taste of the Wild with added vegetables and organic meat.
If your dog is experiencing diarrhea, it is important to consult a veterinarian. In the meantime, you can try adding a few tablespoons of cooked carrot, sweet potato, or squash to their meal to help firm up their stool.
Refusal to eat, vomiting, and diarrhea are all signs that your dog's food may be tainted. If you notice any of these symptoms, it is important to report it to the FDA, Hill's, and the store you purchased it from.











































