Is one enough?

[Didymus20X6]

These guys can tell you better than me, but shouldn't twice or three times a week be a better feeding cycle for a fairly decent sized garter?

[MasSalvaje]

These guys can tell you better than me, but shouldn't twice or three times a week be a better feeding cycle for a fairly decent sized garter?

Not if you are doing a strictly rodent diet. They are a fattier choice and can easily lead to obesity if not kept in check.

Scott Feltzer has an excellent article on feeding. You can find a link to it on his site: Scott Felzer's Garter Snakes, specializing in aberrant garters . Follow the link on his home page that talks about the article that was written for Reptiles magazine.

This site also has a plethera of info in the "Articles" section.

-Thomas