singapore rabbits

alfalfa hay, when it is fine, when it is not

updated 19 May 2026

most Singapore rabbit owners hear “hay” and think of a single category. the truth is there are two types that behave very differently in your rabbit’s body: legume hays like alfalfa, and grass hays like timothy or orchard grass. mixing them up is one of the most common feeding mistakes SG owners make, and in our climate, the consequences show up faster than you might expect.

here is what you need to know about alfalfa: when it helps, when it hurts, and what signs to watch for.

what makes alfalfa different from grass hay

alfalfa is a legume, not a grass. that distinction matters nutritionally.

grass hays like timothy contain around 0.4 to 0.6% calcium and 8 to 12% protein. alfalfa typically contains 1.2 to 1.5% calcium and 15 to 18% protein. it is also higher in calories per gram.

for a growing body, that profile is exactly what you want. for a settled adult rabbit, it is too much of everything.

the higher sugar and calorie content also makes alfalfa more palatable. rabbits tend to prefer it over grass hay. this is a problem if it displaces the fibrous grass hay that keeps their gut moving.

when alfalfa is appropriate

there is a window where alfalfa does real good.

young rabbits under seven months are building bone and muscle rapidly. they need the extra calcium and protein. alfalfa is the correct base hay for kittens up to around six to seven months, alongside fresh pellets designed for young rabbits.

pregnant and nursing does have elevated nutritional demands. alfalfa supports them through gestation and lactation, when their calcium and protein needs are higher than usual.

outside of these two cases, the case for alfalfa in a healthy adult rabbit is weak. your vet may recommend it in specific recovery situations, for example after surgery or in underweight rabbits, but that is a clinical decision.

why alfalfa causes problems in adult rabbits

the excess calcium is the main concern.

adult rabbits excrete calcium through their urine. when calcium intake is too high, the urine becomes thick and chalky. this is sometimes called “sludge.” in more serious cases, it progresses to bladder stones, which are painful and require veterinary intervention.

as of 2026, bladder stone removal in Singapore typically ranges from SGD 600 to SGD 1,500 depending on complexity, anaesthetic risk, and which clinic you use. it is not a small bill.

the second issue is weight gain. alfalfa is calorie-dense, and rabbits in HDB flats often have limited space to exercise freely. a sedentary adult rabbit eating alfalfa daily is likely to become overweight. obesity strains the joints and cardiovascular system and shortens lifespan.

the third issue is gut displacement. if your rabbit fills up on alfalfa, which is tasty and rich, they may eat less grass hay. grass hay fibre is what keeps the gut motile. any reduction in fibre intake increases the risk of GI stasis.

signs that your rabbit may be getting too much alfalfa

watch for these in adult rabbits who have had regular alfalfa access:

  • white or chalky residue around the litter box or on the fleece liner. this is calcium deposit in the urine.
  • thick, pasty, or slow-moving urine. normal rabbit urine can be cloudy but should flow freely.
  • straining to urinate or crying out during urination. see a SG exotic vet the same day.
  • reduced pellet and hay intake. the rabbit is full on alfalfa and skipping fibre.
  • gradual weight gain over weeks or months.

the first two are warning signs. the third is an emergency.

storing alfalfa in Singapore’s humidity

Singapore sits at 70 to 90% humidity year-round, with temperatures between 28 and 32°C. hay deteriorates faster here than in temperate countries where most hay storage advice originates.

alfalfa, being denser and more tightly packed than grass hay, traps moisture more readily. mold can grow inside a compressed block without being visible on the surface.

a few storage practices that work in SG:

  • buy in smaller quantities more frequently, rather than buying a large bale and letting it sit.
  • store in a cool, dry spot away from the kitchen. an air-conditioned room or a cabinet near the AC vent slows moisture buildup.
  • open the packaging and check for a musty or sour smell before feeding. fresh alfalfa smells grassy and slightly sweet.
  • if you see any green, black, or white mold growth, discard the entire affected portion. do not feed moldy hay.

HDB flats present storage limitations. most owners do not have a dry storeroom. using sealed containers with silica gel packets is a practical workaround for small quantities.

what owners often get wrong

giving alfalfa “as a treat” to adult rabbits. owners know alfalfa is not a staple but still offer it as an occasional reward. even small daily amounts accumulate calcium over time, especially if your rabbit is already eating a commercial pellet with moderate calcium. treats should not be legume hay. stick to small pieces of safe leafy greens or a fragment of fresh herb.

relying on the pet shop’s advice without knowing your rabbit’s age. some pet shops in Singapore sell alfalfa without distinguishing between young and adult rabbits. the buyer assumes it is universal rabbit hay. always confirm your rabbit’s age before purchasing a hay type, and transition to grass hay around the six to seven month mark.

switching to alfalfa when the rabbit seems to “not like” grass hay. if your adult rabbit is suddenly refusing timothy or orchard grass, the issue is usually either hay quality (old, dusty, or moldy stock) or that it has been spoiled by too much of a tastier food. the solution is better hay, not switching to alfalfa. a rabbit that only eats alfalfa and ignores grass hay is at nutritional risk.

not knowing what type of hay their vet’s dietary advice assumed. some general advice online says “rabbits need unlimited hay” without specifying which hay. that advice was written assuming grass hay. if you apply it to alfalfa for an adult rabbit, you will overshoot calcium significantly. whenever you receive dietary guidance from a non-exotic-specialist, confirm whether the advice accounts for hay type.

community-sourced information here is not veterinary advice. for any health concern see a licensed SG exotic vet.

community-sourced information, not veterinary advice. for medical issues, see a licensed SG exotic vet — start with our vet directory.

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