Hi there, im new here and have a quick question, i own a ball python roughly 4 years old and he's 3.5-4 feet long, as of lately he's been eating 3 large mice every 2 weeks, i think he is big enough to take on small rats, so i went out and bought one today for him to eat (he hasnt yet he's in a very large box with the rat inside, i check on him about every 5min to make sure everything is ok in there) should i keep him on the rat (about 5-6inches) or should i take him out and go back to mice?