One of my adults hasn't eaten for weeks while the other one has been fine. It's been at least two months since she's had anything at all.
She seems fine otherwise but I did try force feeding her last night because I thought, I simply had to try and make sure she's take something. She was not impressed and I felt quite sorry for her so left her in peace after a few minutes without having managed to get her to eat.
The two tetrataenia are mere slithers, too. Very, very occasionally they will nibble on a bit of worm but really not enough to make them grow. It's so sad when you just can't get them to accept anything
.