Oxbow Natural Science Vitamin C is a timothy hay-based chewable supplement formulated for rabbits, guinea pigs, and rats. Guinea pigs cannot synthesise their own vitamin C, making regular supplementation a genuine health requirement — not a bonus — for most owners of this species.

Each tablet delivers stabilised vitamin C alongside high-fibre timothy hay, making it palatable enough for most small animals to accept willingly. The formulation uses premium herbal ingredients and avoids synthetic additives. The natural base also supports the high-fibre dietary requirements of rabbits and guinea pigs, so the supplement functions as both a health addition and an accepted daily treat.

The practical advantage here is acceptance rate — the timothy hay base means most animals take these voluntarily rather than requiring the supplement to be hidden in food. The chewable format also provides some dental wear benefit for rabbits and guinea pigs, a useful side effect of regular use.