Cats
Temp– 100.5-102.5
- Urinary tract problem
- Periodontal disease/Dental disease
- Chronic kidney disease
- Hyperthyroidism
- Upset GI/Vomiting
- Diabetes
- GI inflammation/diarrhea
- Lymphoma
- Upper respiratory infection (including viral)
- Skin allergies

Runners-up: Ear infection, Eye inflammation.
Note: This list varies slightly year-year.
VeterinaryPartner.com – Physical Exam Checklist for Pets