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I would strongly suggest that you seperate the hamsters into their own cages. You can place the cages side by side so that they can see each other. This is very important as they could cause injury to each other.
I hope this helps. If you need further information, please feel free to contact me.
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The fact that they are fighting even after being together previously means you do need to seperate them. As they have aged, it is not uncommon for them to begin to fight.
In order to avoid injury, providing seperate cages is the best solution.
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C&onsultant/Horse, Many other Pets.
40+ years Horse and Rider Certified Instructor, Owner of 52 horse show boarding facility for 20+ yea