Just one. (1)
it depends on the size of the cage.
1+2+4+8=15 There can't be half of a hamster. Start with the smallest cage with the smallest amount possible:1
Id put two depending on the size of your cage
two per cage for dwarf hamsters but for other types one peer cage ask at the pet shop just in case though
if youhave a big cage you can put up to 4 or 5 hamsters. with a small cage you can have 1 to 3 hamstersI would put 4 in a big cage, and 2 in a small cage.
Many people who have owned hamsters say that, that kind of cage is dangerous for hamsters, even dwarf hamsters. Also, there are many ways that a hamster can be killed in that cage. It's a death trap for a hamster or anything else. They may look cute and colorful but they are NOT good for any type of small rodent.
Six, because the question didn't mention someone taking their body out of the cage.
about eight water bottles
8 bottles
About 19 20-ounce bottles.
About 4 of the regular sized water bottles.
If you mean without a room mate, it is more then not cruel. Actually, it would be slightly cruel to put 2 hamsters together, if one or both isn't young. Unless you have a huge cage. If you mean abandoning a hamster, yes. For hamsters had been domesticated to humans for many, many, many generations and aren't used to being back in the wild again. They can't get food or water by themselves, either. Not when they're locked in a cage, THAT'S for sure! Not just for Russian hamsters, all hamsters! Not just for that other answer, but both answers.