As you live in the US, I can't make recommendations for brands, look for something with small pieces, small amounts of peas, small amounts of corn and fillers like lab pellets, a lot of commercial hamster food is just junk, mainly made of cereal type corn thingies. Often individual pet shop bag their own kind of mix and sometimes it's better quality than branded stuff, plus you can see everything that's in it through he plastic bag!
I make my own mix, which is tailored more to what my Chinese hamster likes:
- the base is a good quality hamster muesli. That makes up quarter of what goes in there.
I add: - lots of millet seeds
- lots of sesame seeds
- lots of golden linseed
- lots of pearl barley
- lots of rye grain
- lots of hemp seed
- moderate amount of high protein cat kibble
- moderate amount of green lentils
- moderate amount of an insect mix, that consists of meal worms, silkworm pupae and other weird worm things
- small amount of peanuts
- small amount of hazelnuts
- small amount of sunflower seeds
- small amount of dried apricot
- small amount of pumpkin seeds
You could add some dried vegetable matter to this, like hay, but Princess doesn't eat that, so it would just go to waste. But dried greens and berries are about the only things she doesn't eat, she's the least fussiest hamster I've ever had.
Also I grow salad cress in her cage, which she respectively nibbles at.
Treats she gets are apple, grapes, carrot, cheese, banana, yoghurt drops, these fruity nibble things, turkey, chicken and very rarely some pork.
She has a nice, soft and thick coat with a shine to it, and is very active, she's neither thin or fat, she's the correct weight, so her diet seems to be okay.