I'm thinking of switching my cats from Purina dry food to a good quality food. I have heard that wet is best, and if I do get wet can they be on an entire wet diet or should there be dry in there too? Is it true that wet feeding is better than dry, are there any benefits to dry? How much wet would wet food cost compared to dry (more or less and by how much)? And I need some suggestions on good wet and dry foods (i'd like an all life stages food if you know of any since I have a 8 month kitten and a 2 yr. old cat) and a the cheapest good food you know (wet or dry) would be very helpful. Thanks!