Sodium is an essential electrolyte that maintains fluid balance, supports nerve signaling, and helps regulate blood pressure. Rabbits need very small amounts, and their natural hay-and-greens diet provides adequate sodium without supplementation. Some owners offer salt licks, but these are generally unnecessary for rabbits on a balanced diet and can lead to excessive sodium intake.
A stalk of celery (about 40g) provides roughly 32mg of sodium — your adult rabbit needs only about 200 to 500mg of sodium per day (about 0.2 to 0.5% of the diet), which is naturally supplied by hay and fresh vegetables. A salt lick is optional and should be monitored if provided.
0.52% of daily nutrient intake
Sodium makes up 0.52% of your domestic rabbit's total daily nutritional requirements by weight. That's a tiny amount — but it matters.
True sodium deficiency is extremely rare in pet rabbits. It could theoretically cause poor appetite, muscle cramps, or lethargy, but a normal diet easily meets sodium needs.
Excessive thirst and urination, and in severe cases, kidney strain. Salt licks are not recommended for most pet rabbits as they provide more sodium than needed.
| Life Stage | Size | Min | Max | Unit | Notes |
|---|---|---|---|---|---|
| Adult | — | 200 | 500 | mg | About 0.2-0.5% of diet. Met by hay and vegetables. Salt licks are optional. |
Source: NRC 1977, general veterinary consensus
