I switched Marcie over from small rats to medium rats last week and it was the perfect size for her! I was worried about switching her over because: a) I don't want her to grow more, and I read that the bigger size she eats and if her terrarium is big (40gal breeder) then she will grow more, b) Marcie has been injured once before with a small rat (small scratch right under her head from the rat's nail while being constricted) so I didn't want the threat to be even bigger with a medium, and c) medium rats are $7.99, which is a $2 increase from what I was paying before, weekly. I was thinking about feeding her only twice a month, so basically, I was wondering: for those who feed medium rats to their snakes, how often do you feed? and how do you tell if your snake is hungry?