I have a ziplock in the freezer saving leftover scraps of vegetable matter for stock, now I ask you fine members. What cant go in stock, thats easier to ask than what can. I assume no fruit obviously but what about a little cabbage yes/no? No tomatoes I assume. Trying to think of others I have wondered about and coming up blank so lets change channels. What about shrimp tails. For a seafood stock, What about cooked salmon or Mahi skin. Did I gross you out, sorry. Leftover squash? Here in the midwest Indian spirits are in the airwaves so I think that is why I like to be so frugal. The Indians wasted nothing.