- Sudden change in diet
- Food intolerance or allergy
- Eating something unusual or indigestible
- Treats or table scraps
- Cow's milk or milk products
Infectious causes:
- Bacterial infections (e.g., Salmonella, E. coli, Campylobacter)
- Viral infections (e.g., parvovirus, coronavirus, rotavirus)
- Parasitic infections (e.g., roundworms, hookworms, whipworms, Coccidia, Giardia)
Medical conditions:
- Inflammatory bowel disease (IBD)
- Pancreatitis
- Liver disease
- Kidney disease
- Diabetes
- Addison's disease
- Cancer
Medications:
- Antibiotics
- Antacids
- Steroids
- NSAIDs
- Chemotherapy drugs
Stress:
- Travel
- Boarding
- Grooming
- Veterinary visits
- Changes in the household