Hello, got a baby corn!

[Centexsnakes]

So the other day, I was getting some more water bottles for my mouse breeding project that kinda has gotten nuts! Lol, anyways, I walked by my petsmarts reptile area, and I saw crickets in with the corn snakes, I was like what the.... So anyways I had to ask about their care and feeding.....ya they are feeding them crickets and rosy red minnows...... I was just shocked...... Anyways, I talked to the manager and let them know why that's wrong, don't think it'll change anything but at least I tried, anyways cause of my "complaining" I had another word I was going to use for this, I ended up with one of their babies, yes I paid money, but he looked at me a certain way and I couldn't leave him, so now I have a new guy, he is in quartile and weights 7 grams, I'm about to offer him food when my next batch is born, should be any day now, but I'm looking for all the advice I can get, his cage is small at the moment, it's kept at 80-84 degrees, has plenty of hides, and is active in the evenings! What info can the great people here give me so I can make this little guy just great!!