I agree,
The males can be a bit more testy. Add in some SD blood and dwarf blood and they tend to be a bit more busy.
Wallace handles well although busy, and I like that he calms down out of the cage.
I've never been able to measure him due to his constant motion but he's on the larger end for a SD X Dwarf I believe.
He'll be 3 in June.
Hope your critters are well. The new one is beautiful.