
Science Diet is a brand of cat and dog food marketed by Hill's Pet Nutrition, Inc. (a subsidiary of the Colgate-Palmolive Company). It was developed in the 1960s by Dr. Mark L. Morris, Jr. PhD DVM, whose father, Dr. Mark Morris, Sr. DVM, pioneered the field of veterinary clinical nutrition. The brand includes both Science Diet and Hill's Prescription Diet, and it offers veterinarian-recommended formulas for specific dietary needs, such as weight management, sensitive skin and stomachs, and hairball control. While it has been the number one veterinarian-recommended brand, providing precise formulas for common health needs, some pet owners have raised concerns about the food's quality and its potential negative impact on their pets' health. There have been reports of pets falling ill or even dying after consuming Science Diet food, although it is unclear if the food was the direct cause. Some pet owners have also noticed changes in the formula, including increased liquid content in wet food and a more yellow colour in dry food, which has led to concerns about the product's effectiveness and safety.
| Characteristics | Values |
|---|---|
| Brand | Hill's Science Diet |
| Product Type | Dog Food |
| Product Range | Dry Food, Wet Food |
| Flavors | Chicken, Tuna, Beef, Sweet Potato |
| Product Variants | Large Breed Adult Dry Dog Food, Large Breed Puppy Food, Science Diet Light, Science Diet Perfect Weight, Senior Cat Formulas, Kitten Food, Adult Indoor Cat Food |
| Ingredients | High-quality protein (chicken, lamb, salmon), Vitamins, Minerals, Amino acids, Natural fiber, Prebiotic fiber, Omega-6 fatty acids, Vitamin E |
| Features | No artificial colors, flavors, or preservatives, Clinically proven kibble technology to reduce plaque and tartar buildup |
| Recalls | Multiple product recalls |
| Reviews | Mixed reviews, some report health issues and formula changes |
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What You'll Learn

Science Diet is linked to pet deaths
Science Diet is a popular brand of dog food, manufactured by Hill's Pet Nutrition. The brand offers a range of products, including wet and dry food for puppies, adult dogs, and senior dogs, with specific formulas for weight management, sensitive stomachs, and skin health. While many pet owners have used Science Diet products for years with no issues, there have been some reports of concerns and alleged links to pet deaths.
In 2019, prior to a recall of several varieties of Science Diet dog food, there were reports of pets dying due to vitamin D toxicity or over-supplementation. Over 25 varieties of canned Science Diet and Prescription Diet dog food were recalled due to potential tainting with excessive vitamin D. While vitamin D is essential for canines, excessive supplementation can lead to serious health issues and, in some cases, even death. This recall affected both wet and dry food formulas and included versions for puppies and dogs requiring weight management.
Some pet owners have shared their experiences online, expressing concerns about the quality and safety of Science Diet products. For instance, one owner reported that their dog experienced digestive issues, such as diarrhea and vomiting, after consuming Science Diet food. Another owner noticed a change in the formula of the dry food, which appeared more yellow than usual, and linked it to their dog's health issues. Additionally, some owners have attributed the deaths of their dogs from various illnesses, such as lymphoma and Anal Cell Carcinoma, to consuming Science Diet food.
It is important to note that while these owners have shared their suspicions and concerns, establishing a direct causal link between Science Diet food and pet deaths can be challenging. In some cases, illnesses and deaths may be related to breed-specific predispositions, age-related health issues, or other factors. However, the reports highlight the importance of ongoing monitoring and investigations into the safety and potential health impacts of commercial pet food products.
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Science Diet formulas have changed
Science Diet is a brand of cat and dog food marketed by Hill's Pet Nutrition, Inc., a subsidiary of the Colgate-Palmolive Company. It was developed in the 1960s by Mark L. Morris, Jr., PhD, DVM, the son of veterinarian Dr. Mark Morris, Sr., DVM, who pioneered the field of veterinary clinical nutrition. The brand includes both the Science Diet and Prescription Diet lines, which offer formulas for specific conditions, life stages, and pet sizes.
Over the years, Science Diet has changed its formulas multiple times. One notable change was in their dry (light) food, which some customers observed had turned a concerning yellow colour. This change coincided with health issues in their pets, including digestive problems and even fatalities. It is unclear whether these issues were directly caused by the new formula, but it has raised concerns among pet owners.
In addition to this formula change, Science Diet has also had multiple product recalls, although the specific reasons for these recalls are not mentioned.
Science Diet continues to be a popular brand, with many veterinarians recommending their products. The brand offers a range of formulas tailored to specific dietary needs, such as weight management, sensitive skin and stomachs, and healthy aging. Their recipes are biology-based, with no corn, wheat, or soy, and are designed to support heart health, digestion, and overall nutrition.
While Science Diet has a strong reputation and is trusted by many pet owners, the reported issues and formula changes have caused some pet owners to seek alternative options.
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Science Diet is vet-recommended
Science Diet is a brand of cat and dog food marketed by Hill's Pet Nutrition, Inc. It was developed in the 1960s by Mark L. Morris, Jr., PhD, DVM, the son of veterinarian Dr. Mark Morris, Sr., DVM, who pioneered the field of veterinary clinical nutrition. The brand includes both the Hill's Science Diet and Hill's Prescription Diet lines, which offer formulas for specific health conditions and life stages. Science Diet is the number one veterinarian-recommended brand for dogs, providing expert nutrition for each life stage, breed, and size. The food is formulated with precise recipes to meet common health needs, such as weight management and sensitive skin and stomachs. For instance, the Large Breed Puppy food is made with optimal calcium levels to ensure controlled bone growth in large breed puppies.
The Science Diet brand has had multiple product recalls and has received mixed reviews from customers. Some pet owners have expressed concerns about the food's quality and safety, reporting issues such as vomiting, diarrhea, and even the death of their pets. However, others have praised the food for helping their pets maintain a healthy weight and improve their digestion. Many customers also mention that their veterinarians strongly recommended the Science Diet brand.
Science Diet offers a range of dry and wet food options for cats, including senior formulas, kitten food, and adult indoor cat food. The cat food is designed to meet specific dietary needs, such as hairball control, urinary health, digestive support, oral care, and healthy skin and coat. It contains no artificial colors, flavors, or preservatives and is made with carefully selected ingredients to ensure proper nutrition for indoor cats.
Science Diet also provides a variety of dog food formulas, including those for large breed dogs, weight management, and sensitive stomachs. The food is formulated with high-quality protein sources, vitamins, minerals, and amino acids to support the health and nutritional needs of puppies, adult dogs, and seniors. Science Diet's kibble technology is clinically proven to reduce plaque and tartar buildup, promoting oral health in dogs.
Overall, while there have been concerns raised about the quality and safety of Science Diet products, it remains a trusted and recommended brand by many veterinarians. The food offers specific formulas to meet the unique needs of different pets, ensuring they receive the necessary nutrition for a long and healthy life.
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Science Diet is marketed by Hill's Pet Nutrition, Inc
Science Diet is a brand of cat and dog food marketed by Hill's Pet Nutrition, Inc., a subsidiary of the consumer goods company Colgate-Palmolive. The company was founded in 1939 by veterinarian Dr. Morris Frank and his partner, Margaret Morse Nice, with the mission of creating a safe and nutritious diet for pets to help them live longer and healthier lives. Since then, Hill's has become one of the most trusted names in pet nutrition, with its Science Diet line of products being especially popular among pet owners.
The Science Diet brand was developed in the 1960s by Mark L. Morris, Jr., PhD, DVM, the son of Dr. Morris Sr., a veterinarian who pioneered the field of veterinary clinical nutrition. The success of Dr. Morris Sr.'s specialized diet for the original seeing-eye dog, Buddy, a female German Shepherd with kidney disease, led him and his son to create additional condition-specific and life-stage pet food formulas under the Prescription Diet and Science Diet brand names.
Science Diet products are formulated to meet the nutritional needs of cats and dogs of all ages, sizes, and activity levels. They contain high-quality proteins, healthy fats, and essential vitamins and minerals to ensure pets receive optimal nutrition. The brand also offers other benefits, such as improved dental health, reduced allergy symptoms in sensitive pets, and a lower risk of obesity. Science Diet is free from artificial colours, flavours, and preservatives, making it a popular choice for those seeking natural pet food options.
However, Science Diet has faced some challenges in recent years, with reports of formula changes and concerns about the health impacts of their food. There have been multiple product recalls due to issues such as "melamine contamination" and "salmonella contamination." Additionally, some pet owners have attributed the deaths of their dogs to Science Diet food, although these claims are difficult to verify. In an increasingly competitive market, with consumers favouring natural and premium pet food options, Hill's introduced the Science Diet Nature's Best line, which included ingredients like lamb, rice, and apples. However, this line struggled to connect with consumers, and the company has experienced a decline in market share.
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Science Diet offers breed-specific nutrition
Science Diet is a brand of dog food that offers a range of breed-specific nutrition options. The brand provides expert nutrition for each life stage, breed, and size, with precise formulas for common health needs. For example, Science Diet's Large Breed Puppy food is specially formulated with optimal calcium levels to support the controlled bone growth unique to large breed puppies. Similarly, their Small and Mini dog food options are designed to meet the distinct calorie requirements of smaller breeds.
The Science Diet Large Breed Adult Dry Dog Food is another breed-specific offering from the brand. This food is formulated to meet the energy needs of large breed dogs, supporting lean muscle development and healthy joints and mobility with high-quality protein, glucosamine, and chondroitin. The blend also includes omega-6 fatty acids and vitamin E to promote healthy skin and a shiny coat.
In addition to breed-specific formulas, Science Diet also offers a range of other products tailored to specific dietary needs. These include weight management formulas, such as the Science Diet Light and Perfect Weight options, which are designed for less active dogs requiring a low-calorie diet to maintain a healthy weight. The brand also provides formulas for sensitive stomachs and skin, digestive support, and healthy aging.
Science Diet's cat food range also offers various breed-specific and life stage options, including senior cat, kitten, and adult indoor cat formulas. These foods are designed to meet the unique nutritional needs of cats, such as hairball control, urinary health, oral care, and healthy skin and coat. The cat food contains no artificial colors, flavors, or preservatives and is formulated with natural fiber for digestive health and high-quality protein for lean muscle development.
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Frequently asked questions
Science Diet is a brand of cat and dog food marketed by Hill's Pet Nutrition, Inc. It is the number one veterinarian-recommended brand, providing expert nutrition for each life stage, breed, and size with precise formulas for common health needs. However, some pet owners have reported negative experiences with the food, including digestive issues and vomiting.
Yes, Science Diet has changed the formula for their dry (light) food. Some pet owners have noticed that the food appears more yellow than before and have expressed concerns about the change.
While Science Diet is a popular and trusted brand recommended by veterinarians, some pet owners have raised concerns about potential health issues associated with the food. There have been reports of pets experiencing digestive problems, weight loss, and in some cases, serious illnesses or death. However, it is important to note that these issues may be unrelated to the food.
Science Diet food contains no artificial colors, flavors, or preservatives and is made with carefully selected ingredients. It includes high-quality protein sources such as chicken, lamb, or salmon, as well as vitamins, minerals, and amino acids. The brand also offers grain-free options to address specific allergies and dietary needs.











































