Feeding

There is no reason to over feed the snake and if its eating at all that is good. I would stick to a weekly feeding of small mice until it can easily take a medium. You can overfeed a snake, especially a captive snake. If you feed it slow and grow it slow it will be healthier in the long run.

It looks like she gave me a rat fuzzy. I bought small frozen mice and medium at petsmart since that was the only place close to get them at the time

Well just feed the small and keep the mediums until your snake is ready.

Like many pet stores it sounds like the lady that helped you didn't know what she was doing. Once you get more seasoned you will become very frustrated at the bad advice and information you hear when you are in pet stores.

If he is the diameter of a quarter and about a foot long, yeah stick to either small mice or if you have a reptile shop in your area that breeds their own, try rat fuzzies. That's is what I fed my little girl when she about a foot long and she ate them no problem. Some places will call anything between fuzzy to pups all fuzzies. Just eye ball the size. The place I buy my rats from, she goes pinkies, fuzzies, weaned, small, medium, large, jumbo. Then you can just ask for a small large or small weaned or large weaned etc. But if he is eating good, now would be probably be a good time to try and switch him to rats while hes young as when he gets big, its much easier and cheaper to feed one small or medium rat every week or two than 4-5 mice every week or two.