I'm wondering if there is a way to identify pregnant dubias even something as simple as wider than the rest..
I've had a few great births this month but also 2 have dropped the sacks so 2 fails.. Maybe just nature or unavoidable but am thinking if there's a way to Id them then I'll avoid disturbing them... (obviously seeing the sack is ideal but very unlikely)
Usually they tend to be the larger dark ones. This is only based on observation when they are eaten and the egg sac appears though. I'm not sure how to tell beyond their relative size.