when my friend and i bought our emps and b. vagans we also bought a starter kit of dubia roaches. i was wondering if anyone else has had any problems feeding thier scorps this kind of bugs. do they tend to prefer crickets to roaches?
Dubia seem to not be the favorite of many scorpions. However, they should eat them if they are hungry.
Some problems I am guessing:
Harder exoskeleton than some other feeders.
Exoskeleton extends to substrate, making "grabbing" them harder.
They burrow into substrate.
One option you have is to pre-kill them. I do this often. I generally just catch one with my tongs and crush it's head. If they are hungry, it should be gone in the morning.
Your other option is to provide another feeder. Crickets are an option. However, keeping a breeding colony of them is messy and stinky. Roaches are much better for at home breeding, imo.
Other roaches I have used with better success are B. lateralis and lobster roaches (I don't know scientific name, sorry). I would also think small hissing cockroaches would work well too, but I've yet to use my small colony as feeders.