I have 2 dogs and 2 cats. They have all been on Blue for over a year. I switched them from Nutro Ultra Holistic because I like the ingredients in Blue better. I have never had any of these gas and poop problems I am reading about. The most trouble I have had is with my bichon. She is only a year old and the lady I adopted her from was feeding her Puppy Chow or some garbage like that. So when I got her at 4 months she was having some serious tummy troubles and she was darn near hairless! I started her on Blue Puppy immediately...did not even bother to mix with the crap she was eating. Tummy troubles went away within about 48 hours and within a month her coat was full and fluffy! When they came out with the small breed formula I put her on that and she just doesn't like the taste. So, I am trying her on the canned and she loves it! Not a bit of problem with it. I also have a black lab mix and to be a mutt he is absolutely beautiful! His coat is nothing short of glossy, big white teeth and when he runs you can see all of his gorgeous muscles! These features have all greatly improved in the year and 1/2 he has been on Blue. He does get some funky gas every now and then but I think that is more from the way he wolfs down his food rather than the food itself as he has always let some doozies fly even before Blue. Lastly, another huge improvement I have seen is with my little black hillbilly cat I rescued a couple of years ago. When I brought her home she was skin and bones and had the roughest ugliest coat. Granted she was a stray trying to survive in the hills of Kentucky. She is still a little bitty thing but she has put on a healthy amount of weight and within 2 weeks her coat went from dull and coarse to glossy and just a silky as can be. I still look at other brands of food when I go to Petsmart and read the nutrition and ingredients as I am always looking for the best possible food and treats for my babies. I have yet to find anything that can measure up to what Blue offers!