help with questions on ladybugs

I have 8 ladybugs and I don't have the type of bug they eat. Will they eat lettuce, can they drink water. Please help me out they're soo cute but, I don't want to kill them. J.J.A
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If it is spring where you are, just release them outdoors.
otherwise
http://answers.yahoo.com/question/index?qid 080101191651AAyAcU1
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