syrian hamster arent supposed to be housed toghether. they are very terrotorial and will fight with eachother. The cage is also way too small. The minimum cage size for a Syrian hamster is 80 cm. wide by 50 cm. deep by 35 cm. but the bigger the better. also they need a wheel of atleast 28 cm big and more toys like climbing, digging or chew toys r great too :) Just looking out for your little hammies