When i get in a mouse eater the first thing i do is switch em to rats. The way i do it is i put the the snake in a smaller tub and throw a rat in. If it doesnt nail it i take the rat out after 10 minutes. I repeat this process till it takes the rat. It works well. Then next time i try and feed i do it in the snakes regular tub. If it doesnt take it then i repeat the smaller tub till it works