Beef & Barley recipe with precisely balanced nutrition to support mobility and muscle mass for older dogs.
Supports energy & beautiful coat. Helps keep immune system, joints, heart & kidneys healthy
Beef & Barley recipe with precisely balanced nutrition to keep adult dogs active and healthy
Supports energy level & beautiful fur. Helps keep immune system, heart & kidneys healthy.
Clinically proven kibble technology to reduce plaque & tartar build-up
Supports the health of the whole urinary system with optimal levels of magnesium
Discover how and where to store your dry, as well as canned, dog and cat food. Learn how to find the "best before" dates on all Hill's pet food packaging.
Learn what a pet's microbiome is, how it contributes to your pet's gut & overall health, and why nutrition is important in maintaining healthy microbiomes.
Compare Hill's Science Diet dog and cat food's calories against other pet food brands and AAFCO recommended maximum calorie count.
Staff Author
|September 17, 2021
Food allergies / intolerance are caused by a reaction to a particular ingredient, which is usually a protein. Sometimes referred to as an ‘adverse reaction to food,’ it is defined as an abnormal response to a food or food additive. There are two classes of adverse reactions: those in which the immune system is involved (generally called food allergies); and those that occur without an immune component (generally called food intolerances).
Allergies may last a lifetime so the ingredient must be permanently removed from your cat’s food.
It may take months or years before your cat develops an allergic response to a particular food. However, once she's allergic, she will almost always have a negative reaction to that food. Allergic reactions are most commonly associated with protein sources – usually the meat in your cat’s food.
Food: The most common causes of food allergies and food intolerance in cats are beef, milk products and fish.
Damage: Inflammation, infection, surgery and some medications can damage the digestive system and may lead to food allergies or food intolerance.
Age: Food allergies and food intolerance can occur at any age.
Breed: Some cat breeds appear more likely to develop food allergies or food intolerance, including Siamese cats.
If your cat vomits frequently, has diarrhea, irritated skin, a poor coat condition or hair loss, then she may have a food allergy. The most common symptoms of a food allergy or food intolerance are digestive upset or skin irritation. If your cat has food allergies or food intolerance, you may notice some of the following signs:

IMPORTANT: Some symptoms of food allergies or food intolerance are similar to those of other serious conditions so consult your veterinarian if you notice any of these signs.
Food allergies or food intolerance may last a lifetime. The main goal in managing allergies or adverse reactions to food is to find and avoid the food ingredient responsible for causing the skin and/or gastrointestinal signs. If your cat suffers from food allergies, it’s even more important to feed the right cat food.
Dietary elimination trials --- removing the ingredient from the food your cat eats --- are the most practical and accurate methods of diagnosing food allergies in cats. The food your cat eats should be balanced and contain as few ingredients and additives as possible. Be mindful to remove access to all other cat food, table food, treats, snacks and chew toys while you are isolating the allergen.
If your cat has an allergic reaction to a certain meat, you may want to try a food with a new protein source - new to your dog, that is - such as duck or venison. If none of this helps, your cat may be allergic to these proteins and will need a food with specially broken-down proteins. For accurate diagnosis and treatment options, always consult your veterinarian and ask them to recommend the best food for your cat’s food allergies
One of our staff authors prepared this article for you
Clinically proven kibble technology to reduce plaque & tartar build-up
With delicious chunks in a decadent gravy
Supports energy level & beautiful fur. Helps keep immune system, heart & kidneys healthy.
Supports the health of the whole urinary system with optimal levels of magnesium
Discover how to identify cat sensitive skin and what you can do to help your cat thrive from head to paw.
When you adopt a cat, you don't just gain a best friend; you also save her life. Here's why getting a cat from a local animal shelter makes so much sense.
Discover the benefits of Hill's line of kitten foods and how they provide complete and balance nutrition for growing kittens.
What is the best food for an overweight cat? Learn all about weight control food for cats, including what's in it and how it works.
Our low calorie formula helps you control your cat's weight. It's packed with high-quality protein for building lean muscles, and made with purposeful ingredients for a flavorful, nutritious meal. Clinically proven antioxidants, Vitamin C+E, help promote a healthy immune system.
Our low calorie formula helps you control your cat's weight. It's packed with high-quality protein for building lean muscles, and made with purposeful ingredients for a flavorful, nutritious meal. Clinically proven antioxidants, Vitamin C+E, help promote a healthy immune system.