Inflammatory Bowel Disease (IBD) is one of the most common causes of chronic digestive problems in dogs and cats. While the condition can be frustrating for both pets and their families, most patients can achieve excellent long-term control and maintain a high quality of life with appropriate diagnosis and treatment.

What Is Inflammatory Bowel Disease?

Inflammatory Bowel Disease (IBD) is a chronic inflammatory condition affecting the gastrointestinal (GI) tract. In pets with IBD, the immune system becomes overly reactive within the intestines, causing inflammation that interferes with normal digestion and nutrient absorption.

IBD exists on a spectrum. Some pets experience only occasional stomach upset, while others develop severe symptoms that significantly impact their health and well-being. Fortunately, many patients respond well to treatment, although long-term management is often necessary.

Common Signs of IBD

Pets with IBD may show one or more of the following symptoms:

  • Chronic or intermittent vomiting
  • Diarrhea
  • Weight loss
  • Poor appetite
  • Nausea
  • Lip licking
  • Teeth grinding
  • Excessive grass eating
  • Abdominal discomfort
  • Flatulence
  • Poor body condition

Because these symptoms can overlap with many other medical conditions, a thorough diagnostic workup is often recommended.

How Is IBD Diagnosed?

Diagnosing IBD involves ruling out other causes of gastrointestinal disease while assessing the health of the digestive tract.

Recommended diagnostics may include:

  • Fecal testing
  • Complete blood work
  • Urinalysis
  • Gastrointestinal blood panel (TLI, PLI, Folate, and Cobalamin)
  • Abdominal ultrasound
  • Dietary trials

The only way to definitively diagnose IBD is through intestinal biopsy and histopathology.

Additional Diagnostic Considerations

Abdominal Ultrasound

An abdominal ultrasound allows a veterinary radiologist to evaluate the structure of the intestinal tract and abdominal organs. This non-invasive test can often be performed while patients are awake, although some pets may require sedation. If enlarged organs or lymph nodes are identified, needle samples may be collected during the procedure.

Basal Cortisol Testing

In younger patients, veterinarians may recommend measuring natural cortisol levels to rule out Addison’s disease. Often called “the great pretender,” Addison’s disease can mimic many of the same symptoms seen with IBD.

Gastrointestinal Blood Panel

Specialized GI blood testing helps determine which portion of the intestines may be affected and can also help rule out pancreatic disorders.

Intestinal Parasite Screening

Although parasites may not fully explain severe gastrointestinal symptoms, they should not be overlooked. Even with negative fecal testing, veterinarians may recommend broad-spectrum deworming therapy.

Chest Radiographs

For pets experiencing unexplained weight loss, chest radiographs help evaluate the thoracic cavity and screen for conditions that may not be apparent during routine examinations.

Intestinal Biopsy: The Gold Standard

While many pets can be managed based on clinical signs and diagnostic findings, intestinal biopsy remains the only way to achieve a definitive diagnosis.

Two approaches are commonly used:

Surgical Biopsy

A full abdominal exploratory surgery allows collection of intestinal tissue samples and evaluation of surrounding organs.

Endoscopic Biopsy

This minimally invasive option requires anesthesia and referral to a veterinary internal medicine specialist. Using a flexible camera, specialists can collect tissue samples from portions of the GI tract without abdominal surgery.

Internal Medicine Referral Centers

For advanced diagnostics and endoscopic procedures, referral to a veterinary internal medicine specialist may be recommended.

BluePearl Renton (Tukwila)
402 Baker Blvd, Tukwila, WA 98188
Phone: (425) 496-1000
bluepearlvet.com

Animal Medical Center of Seattle
17518 15th Ave NE, Seattle, WA 98155
Phone: (206) 204-3366
amcseattle.com

Veterinary Specialty Center of Seattle (Lynnwood)
20115 44th Ave W, Lynnwood, WA 98036
Phone: (425) 800-0930
vsc.vet

BluePearl Kirkland
11814 115th Ave NE, Building J, Kirkland, WA 98034
Phone: (425) 823-9111
bluepearlvet.com

Summit Veterinary Referral Center (Tacoma)
2505 S 80th St, Tacoma, WA 98409
Phone: (253) 983-1114
summitvets.com

Treatment Options for IBD

Treatment plans are tailored to each individual patient and may evolve over time as symptoms change.

Dietary Management

Nutrition forms the foundation of treatment for many pets with IBD.

Novel Protein Diets

Novel protein diets utilize protein sources your pet has likely never eaten before, reducing the likelihood of an immune reaction.

Examples include:

  • Rayne: Rabbit, Crocodile, Kangaroo
  • Royal Canin: White Fish PW, Rabbit PR, Duck PD, Venison PV
  • Hill’s Prescription Diet: Venison d/d, Duck d/d
  • Blue Buffalo Natural Veterinary Diet: Alligator NP

Hydrolyzed Protein Diets

Hydrolyzed diets contain proteins broken into extremely small fragments that are less likely to trigger an immune response.

Examples include:

  • Purina Pro Plan Veterinary Diets HA and Elemental
  • Royal Canin Hydrolyzed Protein and Ultamino
  • Blue Buffalo HF
  • Hill’s z/d

For dietary trials to be successful, pets must eat only the prescribed diet. Treats, table scraps, flavored medications, and supplements should be avoided unless approved by your veterinarian.

Fiber Supplementation

Additional fiber may improve intestinal function in select patients.

Common options include:

  • Unflavored psyllium husk
  • Plain Metamucil
  • Canned pumpkin
  • Prescription fiber diets

Suggested psyllium dosing:

  • Small dogs and cats: ½–1 teaspoon per meal
  • Medium dogs: 1–2 teaspoons per meal
  • Large dogs: ½–1 tablespoon per meal

Probiotics

Probiotics help support healthy intestinal bacteria and may improve digestive function.

Common recommendations include:

  • Visbiome
  • FortiFlora

Vitamin B12 Supplementation

Many pets with chronic intestinal disease develop Vitamin B12 (Cobalamin) deficiencies. Treatment often begins with a series of injections followed by long-term oral supplementation.

Omega-3 Fatty Acids

Omega-3 supplements such as Welactin may help reduce inflammation and support overall gastrointestinal health.

Medication Options

Antibiotics

Some intestinal conditions respond well to medications with anti-inflammatory and antibacterial effects.

Common examples include:

  • Tylosin
  • Metronidazole

While effective, Metronidazole is used less commonly for long-term therapy because of its potential neurological side effects.

Anti-Nausea and Supportive Care

Supportive medications may include:

  • Cerenia
  • Entyce
  • Omeprazole
  • Sucralfate

These medications help manage symptoms and improve comfort during flare-ups.

Steroids

Steroids remain one of the most effective tools for controlling intestinal inflammation.

Common options include:

  • Prednisone
  • Prednisolone
  • Budesonide

Budesonide primarily acts within the GI tract and may have fewer systemic effects than traditional steroids.

Immunosuppressive Medications

More severe cases may require medications that suppress the immune system and reduce intestinal inflammation.

Examples include:

  • Cyclosporine
  • Chlorambucil
  • Azathioprine
  • Mycophenolate

Understanding Empiric Treatment

In some cases, the exact underlying cause of intestinal disease remains unclear despite extensive testing. In these situations, veterinarians may recommend empiric treatment.

Empiric therapy involves starting carefully selected treatments based on the most likely causes of disease and then monitoring the patient’s response. Depending on how the pet responds, treatments may be added, adjusted, or discontinued over time.

Long-Term Outlook

The prognosis for most pets with IBD is good. While IBD is generally considered a lifelong condition, many patients achieve excellent symptom control and enjoy a normal quality of life.

Successful management often requires:

  • Consistent dietary therapy
  • Routine monitoring
  • Periodic medication adjustments
  • Follow-up diagnostics when symptoms change

Monitoring Your Pet at Home

Owners play a critical role in long-term success. Important factors to monitor include:

  • Appetite
  • Vomiting frequency
  • Stool quality
  • Diarrhea episodes
  • Body weight
  • Activity level
  • Response to medications

Any recurrence of gastrointestinal signs may indicate the need for dietary adjustments, medication changes, or additional diagnostics.

With a proactive treatment plan and close partnership between pet owners and their veterinary team, most pets with IBD can continue living happy, comfortable lives for many years.