Well the adults eat cooked meat so I would keep cooked and raw in inventory and test.

I don't think the babys eat at all. There like the S3 wyverns, they only need food when adults.

well the SE wyverns need milk til they get to adult stage so unless the author has set them up that way they'll die if they don't eat something.but yes i would keep both raw and cooked in inventory. put a stack of both in it's belly and see which one it goes for.

Babies of this mod don't have any special food that they would eat, so it would be the same as their taming foods. of course, I would be placing that kind of info in the docs if I ever did do some special baby food thing.