Which Dog Food Brand Should I Avoid Feeding My Dogs?

I have two puppies a 6 month old Husky/Collie Mix and a 11 week old Lab, I want to know which brand of dog food I should avoid feeding them to prevent them from being sick... And also which brand is best to keep them healthy and happy? I'm currently feeding them Beneful which seems like its nutritious and all but is it really please help me help my dogs stay healthy and happy =D