Having said that, nutritionally, mice and rats, I hear, are similar, certainly when adults. What I am potentially interested in doing is offering Yafe (Carpet python) and the boas some kind of bird prey. I imagine the nutritional content of a bird is different than a mouse or rat. Of course, many people feed mice and rats for the long lives of their snakes.
I believe that birds have a lot less fat.
1.0 Normal Ball Python (Flicker)
1.2 Southern Alligator Liazrds (Wraith, Magma & Annie)
0.1 Western Skink (Stella)
1.1 Leopard Geckos (Leo & Jade)