Updated
Small mammal question
Yes. Syrian hamsters should live alone. Adding another hamster can cause stress, fighting, and injury even if the animals seemed calm at first.
Protect solitary housing, deep bedding, and quiet timing.
Start with the social rule for this species before thinking about a bigger cage, a friendly introduction, or a second animal.
Before any pairing, ask a rescue or veterinarian about sex, age, pair history, backup housing, resource guarding, repeated pursuit, wounds, blocked food, and hiding.
Syrian hamsters are solitary, and dwarf hamsters usually do safest in a solo pet-home setup; size changes wheel fit, escape risk, and handling.
Plan the housing around the species' social rule before adding a cage mate, separating a pair, or trusting a calm-looking introduction.
The routine should protect sleep, burrows, water, hoards, wheel use, and low handling.
Chasing, boxing, guarding food or water, wounds, sudden hiding, blocked resting spots, or one animal looking thinner means the social setup is not working.
Before changing housing, confirm sex, age, pair history, backup housing, food access, and what you will do if chasing or wounds start.
No. The page gives the practical rule, then the species profile should decide the final housing, food, handling, and vet plan.
Ask an exotic-pet veterinarian promptly for appetite loss, fewer droppings, labored breathing, collapse, severe lethargy, wounds, heat stress, or sudden weight change.
