Grass hay forms 80% to 85% of a healthy house rabbit's daily diet. However, feeding the wrong type of hayβsuch as rich Alfalfa hay to an adult rabbitβcan lead to obesity, bladder sludge, and fatal intestinal stasis.
Quick Summary: Alfalfa vs Grass Hay by Age
| Hay Type | Protein / Calcium | Fiber Content | Target Rabbit Age |
|---|---|---|---|
| Alfalfa Hay (Legume) | High (15-18% Protein, 1.2% Calcium) | Moderate (25-28%) | Baby Rabbits (0 to 6 months), Pregnant/Nursing Does |
| Timothy Grass Hay | Balanced (8-11% Protein, 0.4% Calcium) | Very High (32-34%) | Adult Rabbits (7+ months) β Unlimited Daily Standard |
| Orchard Grass & Meadow Hay | Balanced (9-10% Protein, 0.3% Calcium) | High (30-32%) | Adult Rabbits & Owners with Timothy Allergies |
Why Baby Rabbits Need Alfalfa Hay (0 to 6 Months)
Young growing kits require elevated levels of calcium and protein to develop strong bones, muscular tissue, and healthy teeth. Alfalfa is a nutrient-dense legume hay that provides the necessary calories during early development.
Why Adult Rabbits Must Switch to Grass Hay (7+ Months)
Unlike humans, rabbits absorb all dietary calcium directly into their bloodstream and excrete excess calcium through their urinary tract. Feeding high-calcium Alfalfa hay to adult rabbits leads to excess calcium precipitation, causing thick chalky urine (bladder sludge) and painful bladder stones.
How to Transition Your Bunny's Hay Safely
When your rabbit reaches 6 months of age, gradually transition from Alfalfa to Timothy or Orchard grass hay over a 3-week period:
- Week 1: Mix 75% Alfalfa hay with 25% Timothy hay.
- Week 2: Mix 50% Alfalfa hay with 50% Timothy hay.
- Week 3: Mix 25% Alfalfa hay with 75% Timothy hay.
- Week 4: 100% Unlimited Timothy, Orchard, or Meadow grass hay.
