[cypher]

I would guess he's a hybrid so make sure you go for low sugar veg, this is my list below.
You can give lots of different seeds in moderation, sunflower, pumpkin, flax, hemp, millet, monkey nuts are usually very popular & they enjoy getting them out of the shell though you may need to make a tiny hole in each end at first.
Very few bought treats are suitable for hybrids but there are a few, the rosewood naturals dandelion sticks are ok as an occasional treat & shrimp cookies are good too but not often.
You can also give a dog biscuit, I use biscrok biscuits & just give half every week or two, dried chicken (make sure it doesn't have any additives) or plain cooked chicken are good for a little extra protein & almost all hamster love whimzees, the tiny toothbrush is best or you can get the small hedgehog or crocodile.

Safe veg, those marked * are relatively high in sugar so only feed to diabetes prone species as an occasional treat if at all.
Asparagus
Basil
Broccoli
Brussels sprouts
Common or red clover
Cabbage, green or red
Carrot*
Cauliflower
Celery
Chard
Coriander
Courgette
Cress (not mustard & cress as commonly sold together)
Cucumber
Dandelion leaves & flowers
Endive/chicory
Green beans/runner beans
Kale
Pak choi/Bok choi
Parsley
Peas/mange tout/sugar snap/snow*
Peppers, any colour
Potato/sweet potato cooked only*
Radicchio
Spinach
Squash/pumpkin*
Swede
Sweet corn/baby corn*
Turnip