So We have 2 little girls, Valentina and Emily. We rescued them both from the pet store after they had been kind of dumped there by relatives of their dead owner. Em came to us sick and we've been working really hard getting her healthy again and we've made great progress!! We took her in for a follow up and her sister, who is plenty healthy, has gained weight with her sister. So now I have a rat that needs to gain weight quickly, and another that needs to be on a diet. How on earth do i even start training them on this? Any suggestions? They have a cage with three levels and a bottom w/ bedding. right now I'm keeping 2 food bowls, one on floor 1 and the other on floor 3.