It is! My hamsters lived on it, and all 3 of my hamsters lived for 3 years max.
But I have a confession, I wasn't that knowledgeable on hamsters at the time, so I didn't bother experimenting with different mixes
I just gave my hammies a bowl Harry Hamster everyday, but porridge in the morning. I did give them a range of treats, but most came in a packet, like the yogurt drops and hamster o's
This isn't a recipe I found, but one I just thought on the top of my head, this doesn't involve the harry hamster food, just a homemade treat!
Hamsters have banana's, and they like the occasional drink of milk, so, how about a big banana slice, soaked in milk then served in a dish? does that sound good?