How to Judge a Hamster’s Development Stage
📝 Summary
Track a hamster's development by birth date, weight, and size. Gestation is about 16 days (robos ~20); eyes open at 15–17 days, weaning at 19–21. Best breeding age is 4–8 months; sexual maturity differs by type (dwarf ~23–48 days, robos ~60). Full growth ends around 5 months.
1 How to Judge a Hamster’s Development
1. Gestation: about 16 days (robos ~20). Pups open eyes at 15–17 days and wean at 19–21.
2. Weaning: the dam starts driving pups off; by 23–30 days they are independent.
3. Breeding age: best at 4–8 months; by about a year they age out as organs decline.
4. Syrian (golden): females average sexual maturity at 48 days, some as early as ~20 days, first estrus about 1.5 months; males mature about a week earlier but estrus syncs with females.
5. Dwarf (Campbell/Winter White): females mature around 48 days but can conceive at ~25 days; males average 23 days.
6. Robos: mature later, around 60 days; males about 10 days later.
7. Maturity means adulthood, but the body keeps growing until about 4 months. True maturity is after first estrus; best breeding is about half a month after, when organs are fully developed. Mature male dwarfs show yellow at the navel and scent-gland discharge.
Development basically ends at about 5 months—independent and fertile; a mating then yields a litter.
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