Recently I adopted dedalus a 8 minth kitten. The guys over at the shelter fed him purina proplan and they gave me a bag of.it. I am thinking of changing it to instinct because my ferrets are on it as well. Do you think.it.will be a good change? Is instict better nutricially speaking than purina? Also I am thinking that if I cahnge to instinct at least I can give him purina wet food just to keep a variety? Do people do that?