Timothy hay should make up about 70% of your adult rabbit’s diet by volume. It’s not a supplement to pellets — it’s the foundation. Hay provides the long-stem fiber rabbits need for digestive health, natural tooth wear, and proper gut motility. Without it, rabbits are at much higher risk for gastrointestinal stasis, dental disease, and obesity.
This guide covers how to choose quality timothy hay, how much to feed, and why timothy specifically matters compared to other hay types and pellets.
What you’ll need
Materials:
- Fresh timothy hay (1–2 pounds per week for an average adult rabbit)
- Hay rack or box for placement (optional but increases consumption)
- Airtight storage container or bag
Prerequisites:
- Access to an exotic vet familiar with rabbit nutrition (if your rabbit has a history of GI or urinary issues, consult before making diet changes)
Before you start
If your rabbit is currently on a pellet-heavy diet, transition gradually using this schedule to reduce GI upset risk:
Days 1–3: Offer unlimited hay alongside 75% of current pellet portion Days 4–7: Continue unlimited hay, reduce pellets to 50% of original portion Days 8–14: Continue unlimited hay, reduce pellets to 25% of original portion Day 15+: Settle at target pellet amount (1/4 cup per 5 pounds body weight)
Some rabbits adjust faster; monitor stool output throughout. Normal output is steady production of round, dry fecal pellets. Soft stool or reduced output means slow the transition and give gut flora more time to adapt.
Rabbits with a history of urinary calculi should have their hay’s calcium content discussed with an exotic vet. Timothy hay is low-calcium (0.3–0.5%), but individual rabbits vary in how they process calcium.
Step 1: Choose fresh, high-quality timothy hay
Not all timothy hay is equal. Look for:
- Green color: Fresh hay is green to light green. Brown, dusty, or gray hay is old or improperly stored.
- Clean smell: Should smell fresh and grassy, never musty or moldy. Moldy hay causes severe respiratory and digestive disease.
- Long stems: Look for intact stems rather than crumbled bits. Long-stem fiber is what supports GI motility.
Check the feed analysis tag if buying from suppliers that provide it. Quality timothy hay shows crude fiber between 25–30%. Rabbit digestive health depends on adequate dietary fiber to maintain gut motility and prevent stasis — the fiber percentage tells you whether the hay will actually deliver what your rabbit needs. Many quality online suppliers and feed stores include this analysis; it’s worth seeking out.
Where to buy: Pet stores carry timothy hay, but it’s often stale or overpriced. Small-animal feed suppliers, online retailers like Small Pet Select or Oxbow, or local farms with rapid turnover typically offer fresher hay. Buy in quantities your rabbit will consume within 4–6 weeks for peak palatability.
Storage: Store hay in a cool, dry place in a breathable bag or container. Moisture promotes mold. Discard any hay that develops visible mold, feels damp, or smells off.
What actually happens to stored hay
There’s a persistent myth that hay loses all nutritional value after 4–6 weeks. That’s not accurate. What declines over time is palatability — hay becomes less fragrant and appealing to rabbits — and some vitamin content (primarily vitamin A). The fiber structure and mineral content remain stable for months when stored properly. The real risk threshold isn’t age; it’s mold. Hay stored in humid conditions or exposed to moisture grows mold, which causes serious respiratory and digestive illness. Dry, well-stored hay that’s six months old is safer than moldy hay that’s two weeks old. Judge by smell, appearance, and dryness, not by the calendar alone.
Step 2: Offer timothy hay as the primary food source
Place hay where your rabbit spends the most time. Many rabbits graze while they use their litter box — putting hay in or near the litter box dramatically increases consumption. You can use:
- A hay rack mounted to the cage or pen
- A cardboard box filled with hay
- Loose hay piled in a clean corner
Rabbits should have unlimited access to timothy hay. A 5-pound adult rabbit typically eats a pile of hay about the size of their body each day. If your rabbit isn’t eating that much, placement is often the issue, not preference.
Step 3: Supplement with a small portion of pellets
Adult rabbits need only about 1/4 cup of pellets per 5 pounds of body weight per day. Pellets add concentrated vitamins and protein, but they’re a supplement to hay, not the centerpiece.
Hay provides:
- Bulk fiber that keeps the digestive tract moving (rabbits lack the stomach structure to vomit and rely entirely on forward GI motility)
- Natural tooth wear (rabbit teeth grow continuously; chewing hay grinds them down naturally)
- Support for cecal flora balance, which produces the nutrient-rich cecotropes rabbits re-ingest
Pellets don’t replace any of those functions. Even premium pellets lack the long-stem fiber structure hay provides.
Verify it worked
Within 2–3 weeks of a hay-based diet, you should see:
- Consistent hay consumption (pile noticeably smaller each day)
- Normal stool output: round, dry pellets in steady quantity
- Active foraging behavior
- Stable weight
If your rabbit ignores the hay or stool output drops, recheck hay placement and freshness. Some rabbits are picky about hay quality and will refuse stale or dusty batches.
Hay types for rabbits: what else works
Timothy hay is the gold standard for adult rabbits, but other grass hays are safe alternatives or additions for variety:
| Hay Type | Fiber % | Calcium % | Best For |
|---|---|---|---|
| Timothy | 25–30 | 0.3–0.5 | Adult rabbits year-round; safest long-term choice |
| Orchard Grass | 28–32 | 0.3–0.4 | Adults and picky eaters (slightly more palatable, similar nutrition to timothy) |
| Meadow Hay | 24–28 | 0.4–0.6 | Adults seeking variety; mineral content varies by region |
| Oat Hay | 30–32 | 0.2–0.3 | Older rabbits or low-calcium needs; softer fiber, less common |
| Alfalfa | 20–25 | 3–4 | Young rabbits under 6 months, pregnant or nursing does; high calcium — restrict or avoid for adults |
Alfalfa caution: Alfalfa hay is too rich for adult rabbits. The high calcium (3–4%) and protein levels increase the risk of obesity and urinary calculi (bladder stones). Reserve alfalfa for kits under six months or does who are pregnant or nursing. For adults, limit alfalfa to less than 10% of total hay intake or avoid it entirely.
Hay vs pellets for rabbits: the role of each
The persistent myth is that pellets are the main meal and hay is optional roughage. It’s the reverse.
Hay (70% of diet by volume):
- Primary nutrition and fiber source
- Supports natural grazing behavior and mental enrichment
- Essential for digestive motility and dental health
- Prevents GI stasis, the leading cause of emergency vet visits in rabbits
Pellets (15–20% of diet by volume):
- Concentrated vitamins and protein supplement
- Portion-controlled to prevent overeating
- Not a replacement for hay’s structural benefits
Fresh vegetables (10% of diet):
- Greens like cilantro, kale, bell pepper, carrot tops
- Add hydration, micronutrients, variety
Rabbits on pellet-heavy diets consistently show higher rates of gastrointestinal stasis (fiber-deficiency-related blockages that can be fatal), dental disease (no natural tooth wear), and obesity (pellets are calorie-dense; free-fed rabbits overeat). Veterinary nutrition guidance emphasizes hay as the foundation of rabbit diets, not an optional add-on. A hay-first model with moderate pellets and fresh greens supports longer, healthier lives with fewer vet visits.
Troubleshooting
Problem: My rabbit won’t eat timothy hay
Check hay quality first — stale, dusty, or brown hay is often refused. Try a fresh batch from a different supplier. Placement also matters: move hay to where your rabbit rests or uses the litter box. Some rabbits prefer orchard grass or meadow hay for taste; those are safe alternatives with similar nutrition.
Problem: Hay is too dusty and my rabbit sneezes
Dust indicates old or improperly stored hay. Switch suppliers. Shake out hay outdoors before offering it, or lightly mist it with water (then discard uneaten portions within 24 hours to avoid mold).
Problem: My rabbit has soft stool after switching to more hay
Gradual transitions prevent this. If it’s already happening, slow the increase and give your rabbit’s gut flora time to adjust. Soft stool lasting more than 48 hours warrants a vet check.
Problem: My vet said hay is optional if pellets are high-quality
This is outdated guidance. Current exotic vet consensus positions hay as mandatory, not optional. Consider seeking a second opinion from a vet who specializes in exotic pets or rabbits specifically.
When to call a professional
Consult an exotic vet if your rabbit:
- Has not eaten hay normally for more than 24 hours
- Shows reduced stool output or smaller, drier pellets
- Displays signs of pain (bloating, lethargy, tooth grinding)
- Has a history of urinary calculi and you’re adjusting hay types (discuss calcium levels)
- Has difficulty chewing despite being offered fresh hay (may indicate dental disease, especially in older rabbits on historically poor diets)
Preventive annual wellness exams with an exotic vet familiar with rabbit nutrition are recommended. Discuss hay type, intake volume, and pellet portions — not just brand names.
FAQ
How much timothy hay should my rabbit eat per day?
An adult rabbit should eat a pile of hay roughly the size of their body each day. Hay should be available unlimited; they’ll self-regulate intake when it’s their primary food source.
Can my rabbit live on just hay?
Hay alone provides most of what rabbits need, but a small portion of pellets (1/4 cup per 5 pounds of body weight) and fresh vegetables (10% of diet) add vitamins and variety that optimize health. Hay-only diets can work short-term but aren’t recommended long-term without veterinary guidance.
Is timothy hay safe for baby rabbits?
Baby rabbits under six months do better on alfalfa hay due to higher protein and calcium needs for growth. Transition to timothy hay around six months of age. Offer both during the transition period and let them adjust gradually.
Why is timothy hay better than alfalfa for adult rabbits?
Timothy hay has significantly lower calcium (0.3–0.5% vs. 3–4% in alfalfa). Adult rabbits are prone to urinary calculi when fed high-calcium diets long-term. Alfalfa’s higher protein also contributes to obesity in adults. Timothy provides the fiber adults need without the calcium and calorie risks.
Timothy hay isn’t fancy, but it’s the single most important thing you can get right in a rabbit’s diet. Fresh hay, offered unlimited, prevents more health problems than any other single change. For more on rounding out your rabbit’s nutrition, see rabbit pellet guide and vegetables for rabbits. If cost is a concern, timothy hay brands compared breaks down bulk buying options that bring the per-pound price way down.