Well in all honesty, Mojo I got from a breeder cheap, she was a non feeding baby, had never eaten a thing yet.
I first got her to take a live newt I caught out back. I locked the newt in a poly box with the baby snake overnight.
Next morning it was gone and Mojo was a bit plump.
I waited a few days and put some live guppies in her water bowl, she promptly took them.
Then I put 2 thawed pinks in the water bowl with the guppies, and when I checked in on her, everything was gone.
I repeated that for a few months then I just put pinks in the water without fish.
Now she lunges and takes the pinks / fuzzies right off the hemostat.
To grow my garters up, I found that chopping up the fish into a mush, chopping up pinks (it's a lot easier while they are still frozen) and I crush reptomin (turtle food) into it.
I call it "Garter Goulash", they readily gobble the mush up. I just put a teaspoon full of goulash in a poly box and lock the snake in the box with the mush, then I go play on my computer for about half an hour, the puddle is usually gone when I check back in on the snakes.
My goulash puts size on them rather quickly.
This little snow couldn't even wait for me to set it in the box!