Chihuahua Health Issues
Every breed has predictable health problems. For the Chihuahua, the most common conditions are listed below — with what to look for and what to do.
1. Patellar Luxation
This condition appears in Chihuahua populations at higher rates than in mixed-breed dogs. Early signs vary, but most owners notice changes in movement, appetite, energy, or coat. Annual vet exams catch most issues before they become serious; ask your vet about breed-specific screening tests for Chihuahuas.
2. Mitral Valve Disease (Heart)
This condition appears in Chihuahua populations at higher rates than in mixed-breed dogs. Early signs vary, but most owners notice changes in movement, appetite, energy, or coat. Annual vet exams catch most issues before they become serious; ask your vet about breed-specific screening tests for Chihuahuas.
3. Hydrocephalus
This condition appears in Chihuahua populations at higher rates than in mixed-breed dogs. Early signs vary, but most owners notice changes in movement, appetite, energy, or coat. Annual vet exams catch most issues before they become serious; ask your vet about breed-specific screening tests for Chihuahuas.
4. Dental Overcrowding
This condition appears in Chihuahua populations at higher rates than in mixed-breed dogs. Early signs vary, but most owners notice changes in movement, appetite, energy, or coat. Annual vet exams catch most issues before they become serious; ask your vet about breed-specific screening tests for Chihuahuas.
5. Hypoglycemia In Puppies
This condition appears in Chihuahua populations at higher rates than in mixed-breed dogs. Early signs vary, but most owners notice changes in movement, appetite, energy, or coat. Annual vet exams catch most issues before they become serious; ask your vet about breed-specific screening tests for Chihuahuas.
Reducing Risk
Buy from breeders who health-test their breeding pairs. Maintain a healthy weight (extra pounds worsen joint issues), feed an age-appropriate diet, and keep up with annual bloodwork starting at age 6. For the Chihuahua specifically, watch for patellar luxation as the highest-priority concern.
When to See a Vet Immediately
Sudden lethargy, vomiting that won’t stop, distended abdomen (especially in deep-chested breeds), inability to urinate, pale gums, or collapse are emergencies. Don’t wait until morning — find a 24-hour clinic.