Top 7 Fortified Vitamin & Mineral Diets in the United States for 2025: A Veterinarian-Reviewed Guide to Supporting Small Pets' Bone, Coat and Immune Health

Martin Little Friends Timothy Adult Rabbit Food targets rabbit-specific needs with a timothy-based formula that emphasizes high fiber and appropriate pellet sizing while including vitamin support suited to small herbivores. It stands out as a specialist rabbit product compared with the predominantly guinea-pig–focused items in this list, offering a middle-ground price and a technical profile tuned for continuous chewing and gut health. For owners with rabbits who want a timothy-first fortified diet, Martin offers a focused alternative to broader-market feeds like Kaytee or Living World.

Tropican Lifetime Formula Granules (Hagen) is positioned as an economical, complete-life-stage granule that provides steady calcium and vitamin fortification across ages, which is why it appeals as a market leader for budget-conscious owners. In contrast to timothy-only adult maintenance feeds, Tropican’s granulated, all‑in‑one approach limits selective feeding and offers cost advantages, though it can be less specialized for species with strict calcium needs.

Oasis Vita-Drops Pure C stands out as a technically efficient and cost-effective solution for delivering concentrated vitamin C in drop form, which can be easily added to water or applied to food for small pets that refuse powders or tablets. Compared with the powdered multivitamins listed here, its liquid delivery often provides faster absorption and a lower cost per milligram of vitamin C, though it lacks the broader micronutrient spectrum some powders provide.

Oxbow Critical Care Herbivore is the category's herbivore-focused leader, formulated as a fiber-rich, easily syringeable paste tailored to rabbits, guinea pigs and other small herbivores. It holds its position through a veterinary-grade fiber profile and palatability that support gut motility better than general high-calorie gels like Vetoquinol Nutri-Cal, while being more species-targeted than broad-market options such as Tomlyn or Kaytee.

Living World Prime Vitamin Supplement offers a balanced, broad-spectrum vitamin profile aimed at everyday maintenance for small pets, making it a practical middle-ground between single-nutrient drops and research-focused dietary programs. Technically it is formulated for palatability and general micronutrient coverage, so it is often preferred by owners looking for an all-in-one water additive rather than a targeted therapy like Oasis or Oxbow. Its mid-range pricing and wide retail presence make it a cost-conscious choice for routine use.

Living World Green Gourmet Toppers Skin & Coat offers a flexible, budget-friendly way to boost coat health with concentrated flaxseed and herb blends; as a topper it lets owners add targeted nutrients without replacing the staple diet. It stands out for affordability and versatility compared with full-feed products like Vitakraft and Oxbow, though it provides less comprehensive daily nutrition on its own.