Few breeds pack so many distinct health topics into so small a body, and the Chihuahua's list changes with age. Puppies bring questions about the skull and blood sugar, adults about kneecaps, teeth and the windpipe, and seniors about the heart. Six topics cover the ground veterinarians raise for this breed. Each is an association to discuss and observe, and none of them predicts the future of an individual dog.
Kneecaps, Teeth and a Honking Cough
Patellar luxation, a kneecap that slips from its groove, is a familiar small-breed topic. Watch for a hind leg skipped or carried briefly mid-walk, and mention the episodes at examinations where the veterinarian can grade the kneecaps by feel. Dental crowding is the breed's daily reality: a full set of teeth in a tiny jaw leaves little room, retained puppy teeth can trap food beside adult teeth, and tartar and gum disease follow. Lift the lips regularly, report bad breath, bleeding gums, loose teeth or dropped kibble, and ask about the mouth at every visit. Tracheal collapse involves the windpipe's rings softening and flattening, classically producing a dry, honking cough triggered by excitement, pulling against a collar, or pressure on the throat. Film coughing episodes, note the triggers, and ask whether harness walking and weight control belong in your dog's plan.
Puppy Topics: the Molera and Blood Sugar
Many Chihuahua puppies are born with a molera, a soft spot on the skull where the bones have not yet closed. It can shrink as the puppy grows and is a normal feature for the breed, handled with sensible protection of the head from knocks and falls. Hydrocephalus, fluid building within the brain, is a separate and rarer concern that a veterinarian investigates when a puppy shows signs such as a domed head with eyes set oddly, delayed learning, circling or seizures, so raise any developmental worry early rather than comparing puppies at home. Tiny puppies also face the danger of blood sugar falling too low, because small bodies hold small reserves. Weakness, wobbliness, unusual sleepiness or a puppy that goes off food needs prompt veterinary advice, and how often very small puppies should be fed is exactly the topic to settle with the veterinarian at the first visit.
Handling, Falls and the Fragile Frame
Small size threads through every topic on this breed's list, and daily handling deserves its own mention. Puppies whose molera is still open, and adults with fine bones, both argue for a low-to-the-ground lifestyle: carry the dog supported against your chest rather than held out at height, teach children to sit on the floor with the dog instead of lifting it, and use ramps or steps for sofas so landings stay gentle. A fall that seems minor in a larger breed can injure a Chihuahua seriously, so any drop followed by limping, yelping, unusual quietness or a change in how a leg is carried belongs in a prompt call to the clinic. Record accidents with dates even when the dog seems to recover fully, because a kneecap or dental finding months later may read differently against a documented fall.
The Ageing Heart
Mitral valve disease belongs to the senior years: a heart valve that thickens and leaks, detected first as a murmur during routine listening. Report a new cough that lingers, breathing that quickens during rest, tiring on familiar walks or fainting, and ask at senior checks what the heart sounds like compared with previous years and whether imaging is advised. A written history that began in puppyhood — weights, dental scores, cough triggers, murmur notes — gives the clinic a timeline no single visit can supply. One Pet Passport held by KinsLe keeps that timeline intact across house moves and clinic changes, so the senior conversation starts from records rather than recollection.