My hamsters are fighting after living together. Is this normal?

Hello and thank you for reaching out to PetCoach. These are very good questions and it is thoughtful of you to ask these prior to obtaining a hamster. I've attached a link that is very helpful in explaining certain hamsters that live well together and special care instructions. I hope this is helpful! https://www.omlet.co.uk/guide/hamsters/getting_a_hamster/keeping_more_than_one

If your hamsters initially did not get along I probably would not try to put them back together again. Also, if you cage an male and female together they will mate and you may have many liters of babies to take care of. You may be able to get them together on ‘neutral ground’, somewhere outside of either of their cages so they won’t feel territorial of the space. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

There is a good chance that 2 adult male hamsters will fight and induce significant injuries. If you would like to try to introduce them to each other regardless, I would start with a completely clean cage with fresh bedding and keep them on either side of a mesh divider so that they can see and smell each other without being able to fight. I do not recommend putting one into the other’s cage as the original hamster will likely become extremely territorial. For 2 weeks or so, you can remove the mesh divider for short periods of time while you are carefully monitoring them and offering plenty of enrichment in the form of shelters, toys, food treats to keep them occupied. If you notice any aggression, I would give up and keep them separate from then on. If after several supervised periods alone (about 30 min each time) over 2 week you do not notice any signs of aggression, you may remove the mesh divider but examine them carefully each day for scabs/wounds especially on the rumps, genital area, hind legs. Good luck! They are very cute!

It's most definitely due to fighting, they are known to be fighting when kept together, for this reason it is recommended to have only one hamster per cage. unfortunately many pet shops tend to give false information about this, they don't warn you about this issue but this the unfortunate truth. i recommend separating them into 2 different cages.

Thanks for using Petco Pet Education Center, formerly Petcoach! Hamsters can get aggressive, especially around their young. I recommend handling the young as little as possible to prevent Khaleesi from being aggressive towards you or from taking it out on her pups. While it is less likely at this age, hamsters can even canibalize their young when they are stressed. Hamsters can typically be weaned (start eating dry food, no longer needed milk from the mother) at about 3 weeks. I recommend separating them into different cages or homes to prevent the hamsters from reproducing. You should also separate Khaleesi from the male hamster if you wish to prevent further breeding. Once the pups are gone, Khaleesi should resume her normal behavior towards you. I hope this helps!

It depends on the hamesters. Not all hamsters will get along. It is also important that you do not put male and female together unless you want babies or one is spayed/neutered. If you are going to try you need to monitor them closely and I would not leave them together over night. If they are doing well you can leave them together for longer periods of time. Some hamsters will have aggression when put together. Hope that helps

Thank you for your question. Unfortunately if the hamsters were not raised together, it is not likely that they will get along and very possible they will fight and injure eachother. I would be nervous that you are not able to watch them at all times and they could fight and hurt one-another. https://www.petco.com/content/petco/PetcoStore/en_US/pet-services/resource-center/caresheets/dwarf-hamster.html