I just added one more Robo to my group of 3... the minute I put the fatso in, WW3 started! at first they were just chasing each other and each one rolled upon others so fast I couldnt even recognise which is which..

End up, chit non stop... i saw the fierce one! He was chasing everyone in the cage, not recognising who his friends were.... end up I realise he kept chasing off the new addition (fatso) into 1 tube and whenever the fatso came out of the tube the fierce one went and attack him.. in the end, while they both were fighting i just had to split them apart and hold the poor little fatso up and guess what, the fierce buddy was still biting the fatso

I found fatso with a wound on his ass... aih... poor fella... now alone in another cage.. tomorrow gonna bring him see vet liao

This is a good tip but it dosent work all the time. Last time we tried giving this tip but 1 of the forumer hamsters still fights but no harm trying. It might work or not...depends on luck.

But 1 thing i would like to advice is not to use detol, use those safe cage cleaning solutions that you could get from pet shop.

because dettol will leave this very strong odor after using it. Hamster have extremely sensitive sense & this odor will just stress them out. In the end you are just stressing out two of the hamsters.

But if you are using odorless dettol then its fine or you manage to remove the dettol smell then it shouldnt be a problem. Alternative to this is to get proper cleaning solution that is certified safe for hamsters & use it as its designed for that purpose.