Nutro and Eukanuba are about of equal low quality, but at least Eukanuba doesn't have menadione, so if those are your only choices, I would choose Eukanuba. Good foods for about the same price are Blue Buffalo, Wellness, Castor & Pollux, Merrick, Taste of the Wild, Canidae, Solid Gold and Pinnacle.

I use Blue Buffalo and am very satisfied with it. It is a high quality food and is easier to find than most of the other high end foods. You can get it at PetSmart, Petco and Tractor Supply in addition to many independent pet shops and feed stores. Nutro puts menadione in all of its products, including cat food. For that reason alone I would switch.