[cypher]

I just had a look for the wellness food & it does have a few dubious ingredients but so does Versele Laga Hamster Nature really, it has a lot of fruit in it which isn't appropriate for a hamster mix so there's not much to choose between the two really if that's all you can get.
If you can order from viovet you could get a few bags & just keep it in the freezer so it would last you a long time.

Only small pieces of things like tofu or egg (the egg white has most protein but for an underweight ham that hasn't been eating some yolk would be fine too) maybe about 1cm square would be enough, you could give one of these protein extras daily for now but try to vary it not the same each day.