You see your dog itching all over, suffering gastrointestinal problems, chronic diarrhoea or gas. He might be vomiting or even ear scratching or face rubbing.

The itching might lead you to suspect that your furry friend is the victim of fleas. The stomach problems might make you think that he ate spoiled food or is suffering from a more serious condition. A visit to your vet is in order and may lead to the conclusion that your dog has a food allergy.

Skin irritation in particular is a classic sign of adverse reaction to food. Food allergies are difficult to identify because their symptoms are so similar to other disorders. Feeding your dog an elimination food such as Hill’s Prescription Diet™ z/d™ ULTRA can help identify the source of the allergy so your vet can then recommend an allergen-free food for a prescribed period of time.

Hills Author Hills Author
Staff Author

One of our staff authors prepared this article for you

Related articles

Does My Dog Have a Bruise?

If you've noticed an odd bump in your dog's skin, you may wonder if it's a bruise or something more serious. Learn what could be causing this type of issue.

Worms in Dog Poop: Signs, Treatment Options & Prevention

Learn how to identify different types of worms in your dog's poop, how worms can affect their health & what vets may recommend for treatment & prevention.

Can My Dog Eat Popcorn? (& Which Flavors are Safe?)

Learn how safe popcorn is for your dog, particular types & flavors of popcorn to avoid, and how much is an ideal amount for your pup.

Cardiomyopathy in Dogs: What You Need to Know

Learn the basics about cardiomyopathy in dogs, including types of this condition, breeds affected, symptoms dogs might show and how veterinarians treat it.

Dog Bad Breath: What Could Be the Cause?

Constant halitosis, or bad breath in dogs can be a sign of health problems. By understanding the causes, you can tame the odor and enjoy more puppy kisses.

Dog Nipping & Puppy Play Biting

Discover why dog nipping is such a common behavior, even among the best behaved pups, as well as how to get your puppy to stop nipping.

What Happens When a Dog Drinks Alcohol?

Learn what happens when a dog drinks alcohol, how serious alcohol can be for his health, and the steps to take if your pup ever sneaks a sip.

Chondrodystrophic Dog Breeds: All About Short-Legged Dogs

All About Chondrodystrophic (Short Legged) Dog Breeds

Keys to Helping Your Dog Through the Aging Process

Understand the different ailments that can affect aging dogs and what you can do to provide them with the quality of life they're used to living.

Parvovirus: What You Need to Know

Parvovirus in dogs, especially puppies, is a devastating illness that can be fatal. Learn the facts about parvo & what to do if your dog has been exposed.

Common Dog Behaviors Explained & the Meaning Behind Their Moods

Learn what types of dog behavior mean for your best buddy's health and well-being. Once you notice his signals and moods, you'll know how to help him.

When You Should Be Concerned About Your Dog's Dry Nose

A dog's nose can be an indicator of health, so learn how to best care for your dog if their nose is dry, cracked, warm, red, flaky, or has nasal discharge.

Cyanosis & Blue Skin in Dogs: Symptoms, Treatment & More

Cyanosis in dogs can be a serious condition, with symptoms like blue skin needing emergency treatment. Learn what to do if your dog shows signs like this.

Dog Goggles: Does My Pup Need Them?

Learn everything you need to know about dog goggles, including when your dog might need them, the difference between goggles and sunglasses, and more.

Time for a Gut Check: Prebiotics and Probiotics for Dogs

What exactly do prebiotics and probiotics for dogs do, and what's the difference? Educate yourself about your dog's gut health with this overview.

Dog Bitten by a Snake? Clinical Symptoms & What You Should Do

Learn about snake bites on dogs, including clinical symptoms to look for, what to do if you think your dog was bitten, and treatment & prevention options.

Special Diet Needs for Large & Giant-Breed Puppies

Large and giant breed puppies have different nutritional needs than other dogs. Learn how to provide the special care they need to grow up big and strong.

Keeping Your Dog From Begging at the Dinner Table

Learn how to stop your dog from begging at the dinner table, and understand how it can help contribute to his health.

Starting a Training Schedule with Your Puppy

Learn the benefits of starting to train your puppy at an early age, preventing a wide variety of problems and promoting good behavior.

Raising a Puppy: What You Need to Know

Learn how to raise a puppy - prepare your home, get necessary supplies, and understand nutrition, training, socialization, health care, play, and grooming.