The corn thing would be my first objection to Science Diet. My other objection is that they use palm oil in their foods. Palm oil plantations are fast driving the Orangutan to extinction. You can click on the thread linked in my signature to find out more about this. It is a totally preventable tragedy that we take part in every time we buy products made with palm oil.
Other pet food companies that use palm oil are:
Alpo
Beneful
Eukanuba
Fancy Feast (cat food)
Friskies
Iams
Pro Pet Food
Purina
From this link...
http://www.cmzoo.org/docs/palmOilSho...-March2011.pdf
*Note* These companies are RSPO (Roundtable for Sustainable Palm Oil) members. Do not be fooled by this. It is merely an industry group that is trying to deceive consumers through
PR. Here is a link that discussed this...
The Great RSPO Membership Myth: Why Buying from RSPO Members Is Meaningless Rainforest Action Network Blog