Why Do Small Dogs Shake?

4 min read
Why Do Small Dogs Shake?

Small dogs shake for a variety of emotional and physical reasons, from high excitement to sensitivity to cold weather. Because toy and small-breed dogs have unique body proportions, higher metabolic rates and sensitive temperaments, shaking is a common behaviour in smaller canines.

While seeing your little companion shake can feel concerning, it is often a normal response to their environment or feelings. Understanding the underlying causes of shaking helps you determine whether your dog is simply reacting to the moment or needs a little extra support.

Key Points

  • Small dogs shake for a variety of different reasons.
  • Temperature sensitivity and high metabolism are the most common reasons small dogs shake.
  • Shaking can also indicate an emotional response; either fear or stress. · Shaking can also indicate muscle fatigue from their high energy levels.
  • Diet can impact how much small dogs shake.
  • Always feed your small dog a balanced diet, keep them warm, and monitor excessive shaking closely.

Main Reasons Why Small Dogs Shake

1. Temperature Sensitivity and High Metabolism

Small dogs have a higher surface-area-to-volume ratio than larger breeds, meaning they lose body fat more rapidly. Breeds like Chihuahuas and Miniature Pinschers also typically have thinner coats and less body fat to insulate them against the cold.

Shaking is an involuntary muscular response that helps generate internal body heat when ambient temperatures drop. Additionally, small dogs have fast metabolisms and burn through energy quickly to maintain body temperature and support daily activity levels.

2. Emotional Responses: Excitement, Fear and Stress

A small dog’s emotional state translates into physical reactions:

  • Excitement: High-energy small breeds frequently tremble when anticipating something positive, like a walk, a meal or greeting their owners at the door.
  • Anxiety and Fear: Loud noises (such as thunderstorms or fireworks), visits to the vet, or unfamiliar surroundings can trigger an adrenaline surge, resulting in shaking or shivering.
  • Overstimulation: Because they're small, the world can feel overwhelming. Large dogs or unfamiliar people can easily trigger nervous energy.

3. Muscle Fatigue and High Energy Levels

Small breeds pack a lot of energy into a small frame. After periods of intense play, long walks or prolonged standing, their small muscles can tire out quickly, resulting in minor muscle tremors. Trembling after vigorous exercise usually means your dog needs time to rest and recover.

4. Diet and Low Blood Sugar (Hypoglycemia)

Nutrition plays a crucial role in keeping small dogs' energy levels stable. Because of their smaller stomachs and fast metabolisms, toy breeds can be prone to blood sugar drops if meals are spaced too far apart or lack nutrients.

A sudden drop in blood sugar can manifest as:

  • Shaking or trembling 
  • Weakness or wobbliness 
  • Lethargy or disorientation 

Feeding a high-quality, complete diet, such as dry food, formulated to deliver steady, sustained energy helps support balanced blood sugar levels throughout the day.

Why Daily Support Matters

Managing a small dog’s routine comes down to balance. While an occasional shiver during a moment of excitement is completely normal, persistent shaking signal that your dog’s nervous system, environment or health needs attention.

Chronic shaking or stress can stem from:

Dietary Inefficiencies: Diets loaded with heavy filler or lacking steady-release complex nutrients.

  • Cold Exposure: Leaving short-coated small dogs unjacketed in wet or cold conditions.
  • Environmental Stress: Overexposing shy or sensitive dogs to chaotic environments without gentle acclimatisation.
  • Underlying pain or Illness: Joint discomfort, digestive upset, or infections can all manifest as subtle body tremors.

At Burns Pet Nutrition, we believe good health begins with simple, wholesome care. Warmth, gentle training, positive mental outlets, and digestible nutrition help your small dog feel secure and full of vitality.

How to Help Stop Excessive Shaking in Small Dogs

If your dog shakes frequently, you can take several easy steps to keep them comfortable.

Keep Them Warm: Invest in a well-fitted dog jumper for outdoor walks in cold weather, and make sure their bed is in a warm area.

  • Create Safety: Provide a quiet space where your dog can retreat during stressful events like thunderstorms or gatherings.
  • Feed Smaller, Regular Meals: Keep energy levels stable by feeding balanced, nutrient-dense meals structured around your dog’s metabolic needs.
  • Use Desensitisation and Comfort: Calmly reassure your dog when they are anxious, avoiding overly intense reactions that might reinforce their fear.
  • Monitor Muscle Fatigue: Make sure exercise routines suit your dog’s age and size, and allow plenty of rest between active sessions.

When Should I Speak to a Vet?

While occasional trembling is normal for many toy breeds, never ignore sudden or constant shaking.

You should consult your vet if your dog’s shaking is accompanied by:

  • Lethargy, weakness, or collapse
  • Vomiting, diarrhoea, or loss of appetite
  • Stiffness, difficulty walking, or signs of physical pain
  • Uncontrollable muscle spasms, tremors, or disorientation

FAQs

Is it normal for dogs to shake while sleeping?

Yes, light shaking during sleep is completely normal. Dogs experience REM sleep, during which they dream and may kick their paws, twitch their whiskers or tremble slightly. However, if the shaking is violent, continuous, or if your dog can't be easily awakened, contact your vet.

Do some small dog breeds shake naturally more than others?

Yes, certain toy breeds are genetically more prone to shaking than others. Chihuahuas, Toy Poodles, Miniature Dachshunds and Italian Greyhounds are well known for trembling due to a combination of high metabolism, low body fat and sensitive temperaments.

Can a stomach ache make my dog shake?

Yes, digestive discomfort or abdominal pain can cause dogs to tremble. If your dog is shaking while hunching their back, smacking their lips, or refusing food, it may indicate a sensitive stomach or digestive upset. Feeding a simple digestible diet helps support healthy digestion and minimise stomach irritation.