I use Nutro as well! He started it last week and the bag is almost done lol. With the IAMS I would feed him before I left for work at 8:15am and when I got home around 5:45pm he would still have some left. SO he was barley eating twice a day. Now when I get home its all gone lol even the lil bit I drop on the floor. I even have gave him a lil more than normal because Im away so long. I love Nutro and i hope we will stick with it. His stools also look and smell alot beter since the switch