Well He or she ate the nightcrawler that I found in my yard. As for slugs, he's out of luck I've lived here 10 years and have never seen one around my house. of course this is also the first garter snake i've seen here. Something about them being tasty to the gopher snakes. And that was not the container i planned on keeping him in. That's what they brought him in to me in. No bedding, just some water at the bottom of the container for him to sit in and heavily taped. They were afraid it was a Mamba. <snicker!!!> My friend wants me to release it down by the river. Told her it was a one in a lifetime snake! Either way, still debating what to do with it. I might have to ask some of the local kids to catch me some garter snakes so i can photograph them and then have them release the snakes for comparison.