rabbit puberty and hormonal changes, what to expect

most owners who acquire a baby rabbit (10-12 weeks) describe a wonderful first 2 months. then puberty hits and the rabbit becomes a different creature for several months. understanding what’s happening makes it manageable.

the timeline

puberty for rabbits typically begins:

• males: 3-4 months
• females: 4-6 months

and continues through:

• months 4-6: active hormonal changes, peak intensity
• months 6-9: continuing but moderating
• months 9-12: settling toward adult patterns

if spayed/neutered during this period, recovery to calm adult behaviour takes about 8-12 weeks after surgery.

what changes

three main categories of change:

1. territorial behaviour

both sexes become more protective of their space:

• charging at hands entering the enclosure
• lunging or boxing when approached
• defending the food bowl or favourite spot
• “circle and pounce” play that’s actually aggression
• thumping more frequently

2. mating behaviour

intact rabbits develop sexual behaviours:

• mounting (any nearby rabbit or object)
• chin marking (rubbing the chin scent gland on objects)
• urinating outside the litter box (marking territory)
• spraying (males specifically — directed urine flicks)
• sexual receptivity in females (lordosis posture)

3. aggression escalation

some rabbits become genuinely aggressive:

• biting when approached
• chasing the owner
• attacking other pets in the home
• difficulty with normal handling

what’s normal vs concerning

normal puberty behaviour:

• intermittent lunging, often as warning rather than serious aggression
• mounting that doesn’t injure
• moderate territoriality during peak phase
• spraying that’s locatable to specific areas

concerning:

• serious bite wounds drawing blood
• refusal to eat for more than a meal
• self-injury during agitation
• aggression toward other rabbits resulting in injury
• inability to be handled at all for medical care

if concerning behaviours appear, vet consultation is valuable. some require behavioural medication briefly.

the bonded pair consideration

if you have a bonded pair from kit/juvenile age:

• the bond often gets tested during puberty
• both rabbits going through hormonal changes simultaneously
• expect temporary aggression even between bonded rabbits
• spaying/neutering both is the typical solution

if you’re trying to introduce two intact young rabbits to bond:

• typically don’t try during peak puberty (months 4-6)
• wait until after spay/neuter and recovery
• our bonding guide covers timing

the spay/neuter timing

age recommendations vary slightly:

males:

• can be neutered from 3-4 months
• common range: 4-6 months
• earlier is fine; later is fine

females:

• typically spayed at 4-6 months
• some vets prefer waiting until 5-6 months for size
• after 12 months, the surgery is harder but still done

our neutering guide covers cost and process. our spaying cost article covers the female-specific details.

what to do during puberty

1. don’t punish for hormonal behaviour.

the rabbit isn’t being defiant or rebellious. they’re responding to hormones. punishment damages trust without changing the behaviour.

2. maintain calm interactions.

• approach slowly, hand low
• offer food in open hand rather than reaching into the enclosure
• avoid invasive interactions during peak phases
• continue handling for medical care but minimally

3. address spraying / litter regression.

• maintain litter box hygiene
• accept some regression as temporary
• consider adding additional litter boxes during peak phase
• post-spay/neuter, original litter habits usually return

4. plan the surgery timing.

most owners spay/neuter once peak behaviours begin. waiting 2-3 weeks into the phase allows confident diagnosis as hormonal (not medical) and provides a clear before/after.

the post-surgery recovery

after spay/neuter:

• some hormonal behaviour fades within 2 weeks
• most reduces significantly within 4-8 weeks
• complete settling typically by 8-12 weeks
• mature adult personality emerges

some hormonal patterns persist long-term even after surgery:

• territorial preference for certain spots
• some marking behaviour reduced but not eliminated
• some preferences for certain people

SG-specific considerations

three things particularly relevant in SG:

1. climate stress can amplify hormonal behaviour.

hot, humid days make hormonal rabbits more irritable. ensure cooling is adequate.

2. multi-rabbit households need careful management.

if multiple intact rabbits in the home, separate during puberty until all are spayed/neutered.

3. HDB space limitations matter.

intact rabbits territorialise their space. limited space means more concentrated territorial behaviour. plan for this.

what owners often get wrong

three patterns:

• assuming hormonal aggression is “the rabbit’s personality.” it’s hormones. spay/neuter and the personality emerges
• waiting too long to spay/neuter females. beyond 12 months, the surgery becomes more complex. don’t postpone
• rehoming during puberty. this is the worst time to rehome — the rabbit’s behaviour is at its most challenging. either wait through it or commit to working through

related reading

• rabbit neutering in Singapore — timing and cost — male procedure
• rabbit spaying cost in Singapore, 2026 comparison — female procedure
• bonding rabbits — the SG owner’s no-fuss guide — pair dynamics
• reading rabbit body language — distinguishing aggression from warning
• baby rabbit first month care — before puberty stage

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