Hello Courtney. I've recently purchased two different snakes from Petco. The first they said was a common eastern garter which ended up being a Ribbon Snake. The second they said was a "Canadian Garter" which ended up being an Indonesian Striped Keelback. So if you post a picture on here the others on the forum will identify it very quickly for you so you'll know exactly what to feed it. Also I would stop feeding goldfish and start using guppies if you can get them. Hope that helps.