yes, if you think meat/organs/bone - or essentially, what is in a "prey diet"..... and nope.... no kitty power bar or kitty centrum is needed in that case....as an obligate carnivore would a cat not be able to live completely nutritionally sound on meat forever? If that is so than the only nutrients we would have to really worry about getting into the cat would be the nutrients found in meat. Cats must be able to make the rest of the nutrients from other substrates and metabolites. So I guess a kitty power-bar is not needed nor is a kitty Centrum