I've been cleaning out my cupboard and found some tapioca pearls that have been there since 2001!. They look OK but clearly, I'm not going to be using them. I know they need to be soaked before using - would this be OK for my chickens (once they've been soaked and are softened)? They're from a root (I believe) that is common in South America - What do you know? Anyone tried this before? Thanks.