if you want to feed them try to make a dough out bread crumps and flour etc. carp like smelly things such as mussle flavour, etc.
or you can try sweet flavoured things honey, caramel etc.
this should give you some information by what they are caught in europe:
http://www.1stopfishingshop.com/CarpBait.html
or this one:
http://www.carp.net/nut.htm