Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to safely keep multiple hamsters [title] Know your species. [step] Only certain hamsters should be kept in a cage together. Dwarf hamsters, which include russian, chinese, and djungarian hamsters, are very social and enjoy the company of a friend.

Ending1: Dwarf hamsters love interacting with people and usually claim to be " litter babies " when cared for. [title] Put your hamster's cage in a location with a good heat source. Ending2: You might consider picking a dwarf hamster specifically for a relaxing and friendly environment and not a playful one. However, if you suspect that one of your hamsters is a dwarf hamster, consider bringing him into the cage with you to ensure a safe environment. Ending3: Syrian hamsters and other large breeds, though, prefer to live alone. [substeps] Most pet stores sell dwarf hamsters. Ending4: Chinchillas and various other exotic breeds may not be allowed in a small cage. [title] Choose the right space for your hamster.

Answer format: ending1/ending2/ending3/ending4