Understanding Neurological Health in Chihuahuas

Quick answer

Chihuahuas are prone to specific neurological and neuromuscular conditions that require attentive monitoring at home. While some issues like hydrocephalus are congenital, others such as intervertebral disc disease and myasthenia gravis may develop as your dog matures. By maintaining a regular health diary and recording videos of unusual movements or behaviors, you provide your veterinarian with the essential information needed to reach an accurate diagnosis and begin treatment promptly.

Hydrocephalus

Hydrocephalus involves an accumulation of fluid within the brain. This is a recognised tendency in the breed. Owners often notice this condition early in a puppy's life, though it can sometimes present later. You might notice a domed or enlarged appearance of the skull, or your puppy may seem unusually lethargic, have difficulty learning basic house training, or show signs of vision problems. The vet will perform a physical examination to check for neurological deficits and may use imaging such as an ultrasound or MRI to confirm the diagnosis. If you suspect your puppy is struggling with balance or cognitive development, seek veterinary assessment immediately.

Intervertebral Disc Disease

Intervertebral disc disease occurs when the cushioning discs between the vertebrae deteriorate or move out of place, putting pressure on the spinal cord. This is a recognised tendency in the breed. You will likely notice this first as a change in your dog's movement. They may hesitate to jump onto furniture, show a hunched back, or appear stiff when walking. In more severe cases, you might notice dragging of the rear paws or a complete inability to stand. The vet will perform a neurological examination to localize the site of the pain or weakness, often using X-rays or advanced imaging like a CT or MRI to determine the severity of the disc extrusion. This is a recognised tendency rather than a proven one, and how this passes down is not settled.

Myasthenia Gravis

Myasthenia gravis is a neuromuscular disorder that interferes with the signals sent from nerves to muscles, leading to significant weakness. This is a recognised tendency in the breed. At home, you might notice that your dog becomes exhausted very quickly during play or walks. They may have trouble swallowing, show a change in their bark, or appear to have a wobbly gait that worsens with activity but improves after a period of rest. The vet will conduct specific blood tests to detect antibodies or perform specialized nerve stimulation tests to confirm the diagnosis. If you notice your dog struggling to keep their head up or showing signs of muscle fatigue, contact your vet for an evaluation.