Most pet owners will only need small bags of commercial hamster mix as the main dry diet. If you wish to be more adventurous you can offer a blend of seeds, grains, dried insects, nuts and dried fruit/veg. I give more information on my mix to all new homes.
When I first kept roborovski I didn’t feel the need to offer them hay. Over the years I’ve learned better. Robos will eat hay and barley straw with breeding mums consuming far more than normal. With this in mind, offering a small amount of hay, straw or grass, or a combination of the three must be beneficial to your hamster
Extra treats can be offered in the form of dog biscuits, mealworms, roast chicken, porridge (mixed with water), and a variety of other human foods as long as you remember that their main diet is their dry mix. This is where the majority of their vitamins and minerals are found. Avoid foods with high sugar, high salt or high fat contents and remember that honey is still sugar! Roborovski have not yet been found to be prone to diabetes and can eat normal amounts of sugar in their diet, as with fat and salt, avoid giving too much.
Using common sense will mean your hamster remains healthy.
Scattering your robo’s food around the cage will encourage your hamster to forage for it’s food. You can even put food inside of boxes so they have to chew to get it out.
Be aware that your hamster will hoard and stash it’s food so the cage may look empty but they haven’t eaten it all. To avoid selective feeding, scatter their food (or fill their bowl) once every two-three days with small amounts of treats, fresh veg etc in between