I have a four month old kitten. I have fed her whiskas and purina dry food since i got her but want to switch her to IAMS which is what my last cat ate . She just will NOT eat it. She ate nothing all day yesterday . In despair, I gave her tuna which she wolfed down. i hate the smell and mess of wet food. Now I am left with a whole pack of IAMS. What can I do to encourage her to eat it? The person who sold her to us was feeding her Royal Canine or something like it, and she ate a packet of that, but just doesn't seem to like IAMS or purina. Help!!