Hamsters/gerbils/rats/mice | Husbandry and health: a 12-column knowledge tree | Evidence chain

FAQ

What is most often fed wrongly to hamsters, gerbils, rats and mice?

Omnivorous pelleted feed as the staple, a moderate amount of vegetables and fruit, and avoidance of high-fat treats that cause obesity and cheek pouch impaction. Common feeding mistakes: too many sunflower-seed-type treats, and soft wet food packed into the cheek pouch and not cleared, leading to fermentation and infection. ｜ Omnivorous pelleted feed, a moderate amount of seeds, vegetables and fruit; they naturally hoard food. Common feeding mistakes: too many high-fat treats. ｜ Omnivorous pelleted feed, a moderate amount of fresh vegetables and fruit, with obesity to be guarded against. Common feeding mistakes: human food high in sugar and salt, and overfeeding. ｜ As for rats but in smaller portions. Common feeding mistakes: misjudging portion size, leading to obesity or an unbalanced diet.

What signs in hamsters, gerbils, rats and mice mean going to the vet immediately?

Acute watery diarrhoea with dehydration; a torpid state from which the animal cannot be roused (normal hibernation-like torpor must be excluded first). ｜ Persistent seizures that do not settle; traumatic degloving of the tail (never grasp the tail tip). ｜ Severe respiratory distress; a ruptured, bleeding tumour. ｜ Severe traumatic fighting wounds; respiratory distress.

What is the most common disease in hamsters, gerbils, rats and mice?

1. Wet tail (proliferative ileitis): bacterial, precipitated by stress, with young hamsters at high risk → acute watery diarrhoea, dehydration, lethargy, deteriorating very rapidly with high mortality. Merck verbatim: 「Proliferative ileitis is the most consequential intestinal disease of 3- to 10-week-old Syrian hamsters and results in high mortality rates」<https://www.merckvetmanual.com/exotic-and-laboratory-animals/rodents/hamsters>, verified 2026-07-30. → what may be cited is "Syrian hamsters aged 3–10 weeks, high mortality", not any figure in hours or days. ⚠️ The practical meaning for keepers is unchanged and more honest: do not wait out any number of hours — acute watery diarrhoea is an emergency in itself*→ physical examination/faecal testing → emergency supportive care plus antibiotics (prescription) → reduce weaning and transport stress. ｜ 1. Seizures: hereditary or stress-precipitated, mostly benign and self-limiting → brief rigidity/convulsion followed by spontaneous recovery → history and physical examination to exclude other causes → usually no treatment needed, but frequent episodes warrant veterinary attention → avoid excessive startling. ｜ 1. Chronic respiratory disease (mycoplasma-related): environmental ammonia/mycoplasma infection → sneezing, coarse respiratory sounds, reduced activity → auscultation/radiography → antibiotics plus environmental improvement (prescription) → keep the cage clean and ventilated. ｜ 1. Fighting injuries (an extension of barbering): social hierarchy conflict → skin bite wounds, hair loss → physical examination → wound management/isolation of the aggressor (prescription as needed) → assess social compatibility within the cage.