Sorry but no, hamsters are VERY territorial they like their OWN space. They will fight each other if they are put in the same age. They can only be in the cage together as old as 4 weeks.
No animals like being in cages.
You shouldn't buy round or oval cages for hamsters because they will not be very happy in one. Hamsters like the corners of square and rectangular cages. Corners give them a secure place to sit.
humsters like to run around not sit in cages and it also depends what are your hamster.
cages
Yepp
yes because animals like hamsters and rabbits live in cages
None..
no
Wired cages, plus better ventilation.
Hamsters don't generally smell if their cages are cleaned regularly and properly.
Yes, they are great for dwarf hamsters.
some hamsters are trained but if the latch on the cage is shut then no