I'm curious how everyone feeds their rats food mixes that are smaller is size than lab blocks. It seems these feeds will fall through the metal feeding grate. Do you present the feed mixes in crock dishes? Do the rats throw it all over and spoil it?
You do need to use a crock or feeding dish of some kind which is the reason I don't use those mixes very much myself. Just one more thing to clean. But if you don't use the crock they'll usually just bury it and a lot will go to waste.