I had a bout of pneumonia with my ratties and while we have that sorted out, one of the rats (Minnie) has lost a lot of weight. We think she has scarring left in her lungs as she got very, very bad. She's eating but I don't think it's enough. All the rats are on Oxbow Regal Rat. A week and a half or two ago she weighed 330 grams at the vet, today she weighed 299. I got a gram scale 3 days ago and she's been dropping about 3 grams a day since at least then. She's very thin, almost skin and bones and she used to be very chunky. I gave her some cheese the day before yesterday but I don't want her to get sick so I didn't want to give her too much dairy. What should I be giving her to help her gain weight?