Campbell's dwarf hamster care in India: food, water and cage mates

Campbell's dwarf hamster is a species of its own, Phodopus campbelli, not a breed. Animal Diversity Web describes it as a native of the steppes and deserts of Inner Mongolia and north-eastern China, also found in parts of Mongolia's Altai Mountains and the Tuva region. It lives in burrow systems with four to six main tunnels, and some populations on the Mongolian Plateau move into burrows dug by jirds rather than dig their own.

In the wild it eats seeds, nuts and plants, with insects and other small invertebrates now and then. It is generally classed as solitary, though captive animals often tolerate others sharing their space, and males help at the birth, which overturned an older idea that only females cared for the young.

Pet shops often sell Campbell's and winter whites together as Russian dwarf hamsters. The UK VetCompass study shows how loose the naming is: it treated Russian dwarf as another name for the Djungarian (winter white), recorded Campbell's separately, and logged 4.96% of hamsters only as dwarf with no species. The two species look alike and have been crossed in captivity; a review in Genes and Genetic Systems describes the hybrids between them, whose males are sterile.

No source we found records when Campbell's dwarf hamsters reached India or how common they are here. The name Russian dwarf is used loosely, as the VetCompass study shows, so a hamster sold under that name in India could be a Campbell's, a winter white or a cross of the two. Ask the shop, and tell your vet what you were told.

Hamsters are pet animals under the Pet Shop Rules, 2018, which require the seller to be registered with the State Animal Welfare Board and ban the sale of underage animals. In an Indian flat, the cage needs the steady 18 to 21 °C PDSA advises, away from sun and from the cold blast of an air conditioner.

PDSA says Russian dwarf hamsters are particularly prone to diabetes, so diet matters more for a Campbell's than for most hamsters. Feed a complete hamster pellet as the base, because Merck's veterinary text says generic seed mixes let hamsters pick out the seeds and leave the pellets. PDSA warns that muesli-style mixes lead to dental problems and obesity, and that sugar can lead to obesity and diabetes.

Add a small daily portion of washed vegetables and the odd protein treat such as a piece of boiled egg. Keep sweet fruit to a rare taste, and give no mithai, biscuits, honey sticks or yoghurt drops. Grapes and rhubarb can be poisonous to rodents. Your vet can advise on amounts and on any change if your hamster is overweight.

Meals a day: young hamster after weaning, pellets always available, with fresh food introduced slowly; adult, pellets topped up daily, plus a small daily portion of low-sugar vegetables.

Campbell's dwarf hamster (Phodopus campbelli) and the winter white (Phodopus sungorus) are separate species, not breeds of one hamster. A review in Genes and Genetic Systems describes the hybrids between them, whose males are sterile, which shows how closely related they are. The UK VetCompass study, which mapped species against the National Hamster Council's handbook, used Russian dwarf as another name for the winter white, and recorded 4.96% of all hamsters only as dwarf, species unknown.

If you are not sure which you have, say so to your vet and your sitter. The care is the same in almost every way, and the health risks this page covers apply to both.

In the wild Campbell's is generally classed as solitary, though Animal Diversity Web notes that captive animals tolerate others in their territory. The RSPCA names Campbell's among the dwarfs that can sometimes live in pairs or trios with the right care, and warns that many fall out later even if they got on at first. PDSA advises that pet Russian dwarfs should not be housed together at all, because dominance issues and fights often happen.

If you keep a pair, the sitter needs to know which hamster is which and how they normally behave. A sitter checks both at every visit for bites on the rump and face, and for one that is losing weight or kept from the food and wheel. Leave a spare enclosure ready, write down whether the sitter may separate them, and never add a new hamster to an existing pair.

An evening drop-in visit every day suits a healthy Campbell's in a cool room, kept in its familiar cage with its usual food, as the RSPCA advises. Overnight pet sitting is safer for long trips, a heat wave or a pair that has started to squabble. A Campbell's already diagnosed with diabetes or another illness by the vet needs special-needs care, with the vet's plan followed and logged as written.

Petym is not taking bookings yet and opens city by city once its sitters pass the checks. Before the first booking there is a free meet and greet, where you show the sitter the water mark, the food and the hamster awake in the evening. The sitter logs every visit and sends a photo each day; in an emergency they call you and take the hamster to the nearest 24-hour vet on the city's list.