My husband is desperately trying to find one of the three dwarf hamsters we bought today at Petsmart because the salesman (who seemed so knowledgeable) advised me to buy a cage that was not appropriate for this small of an animal!! They all got out hours after we got them home. We relied on his expertise since we had no clue what to buy. Now we have lost one and we feel so bad to have hurt her! Shame on him for not knowing this info and for misleading us. A little lost hamster and another trip tomorrow to Petsmart...not cool.