[velma]

Yes. It's what they do! It's why they have cheek pouches so they can collect up lots of dry food & hoard it - in the wild they like to have a stash in case they have a spell where they don't find much food. The name hamster comes from the German "to hoard". If you're feeding too much they may end up with a bigger hoard than they need but they do need a stash. Some hams will pee on their hoard so if you need to remove that then do replace it with some more food so they don't feel too miffed you pinched their hoard. The exception to this is wet food - such as vegetables - which should be removed if they don't eat it so it doesn't go mouldy in their cages.