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Gastrointestinal Issues: Vomiting, Diarrhea, IBD & Food Allergies

Medically reviewed by Dr. Mark Stevens, DVM, DACVIM. This article was last updated on June 1, 2026.
Dr. Mark Stevens, DVM, DACVIM
Published March 1, 2026
13 min read
DM

Dr. Mark Stevens, DVM, DACVIM

Doctor of Veterinary Medicine (DVM)

Dr. Mark Stevens, DVM, DACVIM is a licensed veterinarian with expertise in digestive and companion animal medicine.

Medically Reviewed

Acute GI Upset

Common Causes

  • Dietary indiscretion ("garbage gut")
  • Infections (viral, bacterial, parasitic)
  • Toxins
  • Foreign bodies

Emergency Signs

  • Repeated vomiting (can't keep water down)
  • Blood in vomit or stool
  • Severe lethargy/collapse
  • Distended, painful abdomen
  • Suspected foreign body

Diagnostic Costs

  • Exam + fecal: $80-160
  • Bloodwork: $80-200
  • X-rays: $150-300
  • Ultrasound: $300-600

Treatment Costs

  • Mild cases: $240-590
  • Hospitalization: $500-2,000+
  • Surgery (foreign body): $2,000-5,000
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Chronic Conditions

Inflammatory Bowel Disease (IBD)

Symptoms: Chronic vomiting/diarrhea, weight loss Diagnosis: Rule out other causes, biopsy ($1,500-6,000) Treatment:

  • Prescription diet: $600-1,200/year
  • Steroids/medications: $300-1,500/year Annual cost: $1,100-3,200 ongoing

Food Allergies

Common allergens: Beef, dairy, chicken, wheat Diagnosis: 8-12 week elimination trial Treatment: Lifelong avoidance, specialty diet ($600-1,200/year)

Intestinal Parasites

  • Roundworms, Hookworms, Whipworms: $15-50 treatment
  • Tapeworms: $15-30 (must treat fleas too)
  • Giardia: $40-100
  • Coccidia: $30-60

Prevention: Year-round heartworm/intestinal parasite preventatives

Exocrine Pancreatic Insufficiency (EPI)

Classic signs: Weight loss, ravenous appetite, greasy stools Diagnosis: TLI blood test ($80-150) Treatment: Enzyme replacement ($600-1,200/year) + supplements Annual cost: $1,320-2,750

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Dietary Management

Prescription diets: Hill's i/d, Royal Canin GI, Purina EN

Bland diet: Boiled chicken + white rice (short-term only)

Feeding strategy: Small, frequent meals (4-6/day)


Related: pancreatitis, diabetes

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