Nutritional Supplements for Adopted Squirrels
Support your squirrel’s health with balanced care

At Adopt a Squirrel Now, we believe that the foundation of a healthy squirrel begins with proper nutrition. That’s why we strongly recommend a diet-first approach to wellness. When your adopted squirrel is consistently fed a well-balanced, species-appropriate diet typically consisting of 80% high-quality rodent block and 20% fresh, squirrel-safe vegetables and fruits there is usually no need for additional vitamin supplementation.
A complete diet not only supports strong bones, teeth, and immune health but also promotes energy, proper digestion, and longevity. However, just like with any companion animal, there are moments in a squirrel’s life where their nutritional needs may shift. Changes in environment, age, stress levels, or health status can sometimes make supplemental support a useful tool.
While over-supplementing can be harmful especially with fat-soluble vitamins knowing when and how to support your squirrel’s diet safely can make a meaningful impact on their long-term well-being.
Whether you’re caring for a growing young squirrel, an adult adjusting to indoor life, or one recovering from stress, this guide will help you understand when supplements are appropriate, which ones to avoid, and how to keep your squirrel thriving through food-first care.
When Should You Supplement?
While most adopted squirrels will thrive on a proper diet and daily exposure to natural light, there are a few special situations where supplements might be appropriate:
- Limited Sunlight Access: If your squirrel lives indoors or in an area with little natural or UVB lighting, a small dose of vitamin D3 may help support bone health.
- Illness, Stress, or Recovery: During times of stress, mild illness, or healing, small amounts of B-complex and vitamin C can support immune and nervous system function.
- Pregnancy: For pregnant squirrels, nutritional needs increase. Talk to your exotic animal vet about appropriate additions to diet or mild supplementation.
- Warning Signs of Nutritional Deficiency: If your squirrel displays weakness, difficulty moving, or signs of Metabolic Bone Disease (MBD) such as shaky limbs, limp back legs, or painful motion consult a vet immediately. MBD is a serious, often irreversible condition that requires urgent dietary correction and specific supplementation (typically calcium, vitamin D, and magnesium in correct balance).
A Few Important Guidelines
- Don’t Overdo It: More isn’t always better. Especially with fat-soluble vitamins like A, D, and E, long-term excess can cause organ damage.
- Only Use Products Labeled Safe for Rodents or Small Animals: Avoid generic or high-potency human or livestock supplements. Look for formulas made for guinea pigs, rabbits, hamsters, or squirrels.
- Provide Access to Unfiltered Natural or UVB Artificial Light: Daily exposure (about 20 minutes) supports vitamin D production naturally. If you use artificial UVB lighting, replace bulbs on the manufacturer’s schedule to ensure effectiveness.
Our Advice: Food First, Supplements Only When Needed
Adopting a squirrel is about providing a nurturing, informed environment. Before adding any supplements, make sure your squirrel’s daily diet is consistent, nutrient-dense, and species-appropriate. Over time, good food and natural light will do more for your squirrel’s health than any over-the-counter vitamin ever could.
If you’re unsure about your squirrel’s diet or notice signs of imbalance, speak with an exotic animal vet or small mammal specialist.