the doggie bag is fine.
Remind me, did I tell you before or not....let your rats alone.
Yes you can wean them to a new diet, however...wean
Do not just up and switch diets on them.
an extreme diet change, a change in temps and many other factors could be leading to what you have experienced. Mazuri and doggie bag in the same hopper and most rats will rush to feeding on the doggie bag, what happens to those that don't? they cause stuff like this to happen. There's a good chance of switching them back will have the same effect. Suffer through and quit changing stuff on them. They are not getting the big variety they would in nature. When you make drastic changes to them in captivity, it can have drastic effects. The doggie bag works fine for half the cost of Mazuri. Those who say differently haven't tried it.