I think you're right about shelling the brazils first - I don't think they're teeth can take it - be interesting to see though. Another thing, before you start feeding them, when the word gets round on the squirrel grapevine you will probably be inundated with them!! Anyway, they like nuts of all types, these should be raw, preferably in their shells. Do not try to feed them salted or roast nuts. Hazelnuts in shells are particularly favoured, followed by raw peanuts in shells. They also like shelled brazil nuts, sweet chestnuts and acorns. They also appreciate it if you put out a shallow bowl of fresh water for them every day. It is not a very good idea to put out shelled peanuts or other small nuts as these either attract large numbers of pigeons, which also like them, or if they are picked up by smaller birds they can choke on them. Look forward to good entertainment!!