Chihuahua Health Issues: Calgary Owner Guide

Grading system (1 to 4):

• Grade 1. Kneecap can be pushed out manually but slides back on its own. Often asymptomatic.
• Grade 2. Slips out during normal activity, returns on its own. Visible skipping or hopping gait.
• Grade 3. Sits out of place most of the time but can be returned manually. Persistent lameness.
• Grade 4. Permanent dislocation. Surgery is required.

Signs to watch for: skipping or hopping gait, holding a back leg up briefly while walking, sudden yelping after a jump, and stiffness after rest.

Calgary diagnosis: palpation exam plus X-rays at a GP vet, about $200 to $400. Grading should be documented in the chart at every annual visit.

Treatment: Grade 1 and many Grade 2 cases are managed conservatively with weight control, joint supplements (glucosamine, omega-3), and avoiding stairs and jumps. Grade 3 and 4 require surgical correction. Calgary cost: $3,000 to $5,000 per knee at Western Veterinary Specialist & Emergency Centre.

About 20 to 30% of affected Chihuahuas develop luxation in the second knee within a few years. Pet insurance enrolled before any vet exam documents a knee issue is essential. Once graded in the chart, it becomes pre-existing.

Calgary dental cleaning cost: $800 to $2,000 depending on how many extractions are needed. Most Chihuahuas need cleanings every 12 to 18 months. Cottonwood Animal Hospital and Country Hills Pet Hospital both offer dedicated dental services with digital dental X-rays, which catch root and bone disease invisible to the naked eye.

Symptoms: bad breath, drooling, dropping food, reluctance to chew, swollen or bleeding gums, and visible tartar.

Prevention is non-negotiable: daily brushing with dog-safe enzymatic toothpaste from puppyhood, VOHC-approved dental chews, and an annual oral exam at every vet visit. Most Calgary Chihuahua owners underestimate this. Lifetime dental costs frequently run $8,000 to $15,000+.

The heart connection. Untreated dental disease causes systemic inflammation that worsens heart disease, which matters more than usual because mitral valve disease is also common in senior Chihuahuas.

Anesthesia note. Dental cleanings require anesthesia, so any Chihuahua over 7 needs pre-anesthesia bloodwork and a cardiac exam first.

The mitral valve degenerates and starts to leak. Early stages are silent and only detected at an annual vet exam by a stethoscope. Later stages bring coughing (especially at night), exercise intolerance, rapid breathing, fainting, and abdominal distension.

Calgary diagnosis: GP heart murmur grading plus a specialty cardiology echocardiogram at Western Veterinary Specialist & Emergency Centre. Echo cost: $400 to $700.

Treatment follows the ACVIM staging system:

• Stage B1 (murmur, no enlargement). Annual monitoring.
• Stage B2 (murmur with heart enlargement). Start pimobendan (Vetmedin), which delays heart failure.
• Stage C (symptoms present). Pimobendan plus ACE inhibitors (benazepril, enalapril) plus diuretics (furosemide).
• Stage D (refractory). Intensive medication management.

Monthly medication costs run $40 to $150 at Calgary pharmacies. Most Chihuahuas with MVD live many years with proper management. Annual cardiac auscultation by your GP vet is part of the senior screening protocol.

Heart murmurs in young Chihuahuas may be congenital (pulmonic stenosis, patent ductus arteriosus) rather than MVD. These need an echo for definitive diagnosis.

Symptoms come on fast: sudden lethargy, wobbliness, weakness, glassy stare, cold to the touch, drooling, vomiting, seizures, and finally collapse and unconsciousness. This can kill a small puppy in hours.

Emergency response:

1. Rub Karo syrup, pancake syrup, or honey on the gums. A small amount, repeated every 5 minutes.
2. Wrap the puppy in a warm towel because they cannot regulate temperature in this state.
3. Drive to a Calgary 24-hour emergency vet immediately. Mission Veterinary Emergency Hospital and Western Veterinary Specialist & Emergency Centre both handle small-breed emergencies.

ER stabilization cost: $500 to $2,000 depending on severity.

Prevention: feed Chihuahua puppies and very small adults every 3 to 4 hours, never let them go more than 6 hours between meals, keep them warm, minimize stress during long days, and always keep a tube of high-sugar syrup at home.

Most adult Chihuahuas over 4 lbs outgrow the risk, but the under-3-lb teacup-sized Chihuahuas remain vulnerable for life.

The molera is more common in apple-head Chihuahuas than deer-heads and is considered breed-standard, but it allows for less protection of the brain and can be associated with hydrocephalus when severe.

Symptoms typically appear in puppies and young dogs: a domed or larger-than-normal head, the eyes appearing to point outward and downward (“sunset gaze”), circling, walking in tight circles compulsively, seizures, blindness, slow learning, difficulty with house training, and developmental delays.

Diagnosis: clinical signs plus an MRI of the brain, $2,500 to $3,500 at Calgary specialty neurology (Western Veterinary Specialist & Emergency Centre, VCA Canada West).

Treatment: mild cases use corticosteroids and diuretics to reduce fluid pressure. Severe cases may need surgical placement of a ventriculoperitoneal shunt, $4,000 to $8,000, with mixed outcomes. Many mildly affected dogs live reasonably normal lives with medication. Severely affected puppies often have a poor long-term prognosis.

For adopters: gently examining a puppy for an open molera at the top of the skull is reasonable. A small molera is breed-typical and usually harmless. A large open area combined with neurological signs is a red flag. Reputable breeders avoid pairing two dogs with prominent moleras.

Other signs: exercise intolerance, gagging, retching, bluish gum color in severe episodes, and worsening cough at night.

Calgary diagnosis: chest X-ray (sometimes fluoroscopy for collapsing trachea) at a GP vet, $300 to $600. Severity is graded 1 to 4 by how much the trachea collapses.

The single most important prevention step: use a harness, not a collar. A collar pulling on a Chihuahua neck can trigger or worsen tracheal collapse. A back-clip harness distributes pressure across the chest and shoulders. Front-clip harnesses are also fine.

Treatment of mild cases: cough suppressants (hydrocodone, butorphanol), bronchodilators, and weight management. Severe cases (Grade 3 to 4 with constant coughing) may need surgical tracheal stenting at Calgary specialty surgery, $3,000 to $7,000 with significant ongoing risks.

Avoid: smoke, dusty environments, hot dry air, and stressful events. Calgary winter dry indoor air can worsen symptoms. A humidifier helps. Tracheal collapse is progressive but most dogs are well-managed for years with conservative care.

General rule: at minus 10 Celsius, limit outdoor time to 5 to 10 minutes. At minus 20 Celsius or colder, only the briefest bathroom breaks, and only with insulation.

Winter kit:

• A well-fitted winter coat is non-negotiable.
• Booties protect paws from frostbite, road salt, and ice cuts. Most Chihuahuas adapt to booties in 1 to 2 weeks of consistent use.
• Pad balm helps if booties are refused.
• Indoor potty pads are reasonable for the coldest weeks.

Cold stress signs: shivering, lifting paws off the snow, whining, slowing down, or curling up to refuse to walk. Get them inside immediately.

Frostbite typically hits ear tips, tail tip, and paws. Signs include pale or grey skin that later turns red or black, swelling, and pain. Take any suspected frostbite to a Calgary vet within hours.

The hypoglycemia link. Cold weather worsens hypoglycemia risk because the dog burns calories to stay warm. Feed slightly more in winter, and keep your emergency Karo syrup handy.

Heat is the other extreme. Chihuahuas overheat fast in summer because of their small size and poor thermoregulation. Avoid pavement walks above 25 Celsius. See our Chihuahua winter survival guide for the full Calgary protocol.

Symptoms: unexplained weight gain on a normal diet, lethargy, hair thinning or symmetric hair loss, dry flaky skin, recurrent skin infections, cold intolerance (worse than the baseline Chihuahua cold sensitivity), and slowed heart rate.

Diagnosis: a thyroid panel (T4, free T4, TSH) at a GP vet, $150 to $300 in Calgary. Annual senior bloodwork starting at age 7 should include thyroid values.

Treatment: daily levothyroxine pills, lifelong. Cost runs $20 to $40/month at Calgary pharmacies. Recheck thyroid levels at 6 weeks, then annually. Most dogs respond well within 4 to 8 weeks.

Other senior screening priorities:

• Annual cardiac auscultation. Refer to specialty cardiology if a murmur develops.
• Senior bloodwork (CBC, chemistry) to catch kidney and liver changes early.
• Blood pressure check. Hypertension is under-diagnosed in small breeds.
• Quarterly weigh-ins. A 0.5 lb gain on a 5 lb Chihuahua is 10% of body weight.

1. Annual full dental exam at every vet visit, with professional cleaning every 12 to 18 months once tartar is visible.
2. Patella palpation at every vet visit. Grading should be documented in the chart so year-over-year changes are clear.
3. Annual cardiac auscultation by your GP vet, starting from age 5. If a murmur is detected at any age, refer to Calgary specialty cardiology for an echo within 1 to 2 months.
4. Annual eye exam, including a check for cataracts in seniors, dry eye, and corneal ulcers.
5. Senior bloodwork (CBC, chemistry, thyroid) starting at age 7.
6. Monthly home weigh-ins. Even a 0.5 lb gain on a 5 lb Chihuahua is 10% of body weight and significantly worsens patellar luxation, MVD, and tracheal collapse.
7. Annual chest X-ray once a heart murmur or chronic cough develops.

Calgary cost for the full annual workup: $300 to $600 at a GP vet (not counting dental cleanings or specialty echo). Senior packages at Calgary clinics often bundle the screening tests at a discount. Document everything, and ask for a copy of all reports. This pays off for pet insurance, for specialty referrals, and for tracking changes over time.

• Western Veterinary Specialist & Emergency Centre. Cardiology (MVD echo, Stage B2+ management), orthopedic surgery (patellar luxation correction), neurology (hydrocephalus MRI, syringomyelia workup), and 24-hour emergency.
• Mission Veterinary Emergency Hospital. 24-hour emergency, hypoglycemia stabilization, small-breed-friendly intake.
• VCA Canada West. Cardiology, ophthalmology, neurology referral.
• Cottonwood Animal Hospital. Dental services with digital dental X-rays.
• Country Hills Pet Hospital. Dental services and small-breed-focused care.

Pet Poison Helpline: 1-855-764-7661. Charges a per-call fee but is fast and trustworthy.

Chihuahua-specific lifetime risks (patellar luxation, dental, MVD, tracheal collapse, hydrocephalus) can easily total $20,000 to $40,000+ over a 14 to 18 year lifespan. Pet insurance is one of the highest-ROI decisions for this breed.

What to verify when shopping:

• No exclusions for hereditary or congenital conditions. Some Canadian insurers exclude these by default. Read the fine print.
• Annual or lifetime limit of $15,000+ to cover potential ortho surgery plus ongoing cardiac care.
• 80% to 90% reimbursement after the deductible.
• Deductible of $300 to $500 (lower premiums for higher deductibles).
• Specialty and emergency coverage included.

Calgary premiums for a young healthy Chihuahua: $35 to $70/month with a $300 deductible and 80% coinsurance.

Top providers for Chihuahuas: Trupanion (no per-condition limits), Pets Plus Us, Petsecure. Avoid: any policy with per-condition limits under $5,000 or annual limits under $10,000.

The enrollment timing reality. Insurance bought on adoption day, before any vet visit, gives full coverage for everything the breed develops later. Insurance bought after the first GP exam (which will document any existing patellar laxity, heart murmur, or dental issue) gives you a policy with those conditions permanently excluded. The gap is enormous over a 15-year lifetime.