My first ever queen, a Camponotus pennsylanicus, has had an awful time founding her colony. Seeing her problems, I would periodically feed her sugars that she eagerly accepts. Before hibernation, she still hadn't had any workers. I took her out in March, after 4 months, and she finally had a couple larvae. One eventually pupated. I invested in a heat cable, finally, and placed her and all my other queens on it.
I checked on her yesterday. the pupa is decimated. the other eggs and larvae are gone. She is gnawing viciously on the cotton plugs. I gave her more sugar. The addition of heat (on only one side of the tube) caused her to freak out. I've been doing my best at leaving her alone. My Crematogaster has 2 nanitics. I've seen people say these are very temperamental. I'm trying to say I thought I was doing well leaving her to found, but still she can't seem to manage.
Do I euthanize and wait for the next flights coming up? Stuff her full of sugars and try again? I just got a thick foam mat I'm willing to try stuffing her tube in and see how that goes (prevent vibration and light). Maybe attempt one more founding before I call it quits.