Small animals can reproduce quickly, and young animals are often missexed. A surprise litter may look cute, but it can endanger the mother, create overcrowding and leave you responsible for homes you did not plan.
Do not rely on a quick guess
Sexing young rabbits, guinea pigs, hamsters, rats and mice takes experience. Ask an experienced breeder, veterinarian or rescue to check if you are unsure. With some species, the distance between the genital opening and anus helps, but mistakes are still common.
Separate in time
Young animals can become fertile earlier than beginners expect. If you keep mixed groups, ask exactly when males and females must be separated for that species. Waiting "a little longer" is how many accidental litters happen.
Buying safely
Ask the seller how sex was determined and whether animals have been housed by sex. If you buy a pair, make sure the combination is suitable and not simply two animals placed together to sell quickly.
