A bit OT, but I really feel this food source is overlooked.

My large girls enjoy rabbit kits on occasion. If you have access to them (I raise my own), they grow to the size of a small/med rat in just a few days' time and most snakes IME love them. They're like little marshmallows of protein.

Nutrition content off rodentpro, formatted as above:
Rabbits (neonate)
- kcal/g = 5.06
- Crude protein % = 72.1
- Crude fat % = 13

I don't feed them too often because I want them to get the extra calcium from adult rodent bones.