Chihuahua

The Chihuahua is the smallest recognised dog breed in the world and one of the oldest breeds in the Americas. Believed to descend from the Techichi, a small companion dog kept by the Toltec civilisation of ancient Mexico, the modern Chihuahua takes its name from the Mexican state of Chihuahua where the breed was discovered and developed in the mid-19th century. Introduced to the United States and subsequently to Australia, the Chihuahua became one of the world's most recognisable small breeds. Two coat varieties are recognised: smooth coat (short-haired) and long coat. Under the Australian National Kennel Council (ANKC), the Chihuahua is classified in Group 1 (Toys).

Chihuahuas require two short daily walks plus indoor play — they are not high-exercise dogs. They are sensitive to temperature extremes and should not be exercised in very hot or cold conditions without appropriate protection. Training should begin from puppyhood; the Chihuahua's small size often leads owners to excuse behaviours that would not be tolerated in a larger dog — this is a mistake that leads to anxiety, reactivity and problem behaviour. Positive reinforcement training from puppyhood builds a confident, well-mannered dog. Dental care is the most significant ongoing health commitment. Feed a quality small-breed food in carefully measured small portions twice daily.

Smooth coat: Minimal grooming — a weekly wipe-down with a damp cloth or soft brush to remove loose hair and keep the coat gleaming. Bathe every three to four weeks. Long coat: Brush two to three times per week with a soft slicker brush to prevent tangles, particularly in the feathering around the ears, neck and legs. Bathe every three to four weeks. Both coat types: Check and clean ears weekly. Dental hygiene is the most critical grooming task — Chihuahuas are highly prone to severe dental disease due to their small jaw and crowded teeth. Brush teeth daily if possible. Trim nails every three to four weeks — nails grow quickly in this breed and overgrown nails affect gait and comfort.

Socialisation is critical and frequently neglected in this breed due to small size. A Chihuahua without adequate socialisation becomes fearful, reactive and anxious — a combination that can lead to defensive biting. Puppy school from as early as possible, followed by consistent positive exposure to a wide variety of people, dogs, environments and handling, is as important for a Chihuahua as for any large breed. Resist the urge to carry the dog everywhere — allowing it to walk and explore builds confidence and reduces anxiety. Teach children to sit down with the dog rather than picking it up; falls can be fatal in this breed.

Chihuahuas are intelligent and benefit from regular mental stimulation through training, puzzle toys and interactive play. Short trick-training sessions are ideal — this breed enjoys learning and is capable of a wide range of commands and tricks. Appropriately sized puzzle feeders, snuffle mats and scatter feeding encourage natural foraging. Indoor enrichment suits this breed well given its small size and temperature sensitivity. Rotate toys to maintain novelty. Despite the small size, this breed benefits from confidence-building enrichment — allowing it to explore new environments, navigate moderate physical challenges, and succeed at tasks builds the independent confidence that prevents anxiety.

Dental Disease: The most significant and common health concern in Chihuahuas. The small jaw causes crowding of teeth, rapid tartar accumulation and early tooth loss. Daily tooth brushing from puppyhood and regular professional dental cleans under veterinary supervision are essential.

Patella Luxation (Luxating Patella): Kneecap dislocation; very common in small breeds. Ranges from mild to requiring surgical correction.

Hypoglycaemia: Low blood sugar, particularly in very small or toy puppies. Feed small meals regularly and do not allow extended periods between meals in young dogs.

Collapsing Trachea: Weakness in the tracheal rings causing a honking cough, particularly during exercise or excitement. Use a harness rather than a collar to reduce tracheal pressure.

Hydrocephalus and Fontanelle: Apple-dome skulls may have an open fontanelle (soft spot on the skull) — avoid any pressure or impact to the head in affected dogs.

Temperature Sensitivity: Chihuahuas chill rapidly and overheat easily. A coat or jumper in cold weather is often necessary.