Cold turkey. Don't do insects until it eats the CGD. Try hand feeding until it decides to eat on it's own. I got 3 gargs from a baby food feeding breeder. I don't know why breeders do this when they know they'll be selling them and 99% of buyers will be using CGD. Why does the store sell it if they don't use it? Ignoramuses.
It took a month of hand feeding until injust decided they needed to suck it up and eat on their own. They did. Took awhile but there's poo in their tanks so I no longer stress over it.
3.1.0 R. Auriculatus, 1.0.0 R. Chahoua PI, 0.0.3 T. Corticale, 1.1.0 peacock reed tree frog, 1.1 gray banded king snakes, 0.1 snow corn snake, 1.0 beige chinchilla, 1.0 boxer, 1.0 French bulldog