You should feed a prey item as large or slightly smaller than the snakes widest girth, once a week (usually most use the same day each week). If your snake is between sizes you can offer two smaller items until they are ready for the next size up. I did that with mine and he was fine. Just remember if you offer two, just offer one at a time. When he finishes the first and starts moving (hunting) around again THEN offer the second. He may or may not refuse the second prey item. Leave it up to him. If you feed live DO NOT leave the prey item in with the snake no longer than 15 minutes or so, and do not give both at once. If he refuses a meal, then just wait until next week and try again. Hope that helped. Good luck!