Health and welfare
Make sure you are familiar with your hamsters and how they normally behave. This will help you notice if they are behaving differently and can be an early sign that something is wrong.
Only use medicines that have been specifically recommended for your hamsters by a vet. Human and other animal medicines can be very dangerous to hamsters, and some oral antibiotics can lead to serious digestive disorders.
Always check your hamsters regularly. They can find being handled stressful, but it is important to regularly check them for health and welfare reasons. Always handle your hamster(s) carefully and considerately, in a confident but gentle manner. Never startle or frighten your hamsters, they are naturally very timid and loud or threatening noises can frighten them and cause them distress.
Provide your hamsters with suitable gnawing material to keep their teeth sharp and prevent their teeth from growing continuously and causing health problems and pain. Regularly check your hamster's front teeth, and ask your vet to check their teeth to make sure that they are growing properly.
If your hamsters are long-haired make sure their coat is kept clean and un-matted by regular combing or brushing. For advice on how to groom them speak to a pet care specialist.
Do not transport your hamsters unless absolutely necessary. If you have to transport them, make sure you reduce stress wherever possible.