[cypher]

None of my dwarf hams have been fond of rocket either! They don't generally seem to keen on the stronger herbs & salad leaves, maybe that's more of a syrian taste although it may just be an individual thing.
There aren't really any other health problems specific to hybrids other than the potential for diabetes, the same as others hams generally.

A big empty bath looks a bit intimidating for a tiny dwarf & a bit slippy for furry feet, he might be more comfortable interacting with you in a playpen (metal ham pens are good or even an enclosure made out of cardboard boxes) or you could put a towel on the bottom of the bath either with some little toys or sit in & let him climb on you maybe.