Feeding...

[crzy_kevo]

garters do not eat crickets
garters will eat earth worms (not red wigglers)night crawlers work well
pieces of fish such as salmon and tilapia
guppies
small frogs and other amphibians
and pinky mice
have i missed anything?

[anji1971]

have i missed anything?

Only that from what I've been reading here, red bellies can be rather difficult to keep in captivity.
Try your garter on worms, they usually go for that.