I Also recommend going with Innova. I think that Eukanuba and IAMs are working together (I think).. but I know one thing about IAMS.. they are junk.. and they treat their lab dogs like it too (
www.iamscruelty.com)
if you'd like more information about healthy foods, or foods to avoid in dog food/ingredients:
http://www.mordanna.com/dogfood/index.php?page=identify
if you'd like more information on innnova:
www.naturapet.com