We have 2 cats that have had really bad gas issues for the past 2 years. We have tried everything to make the situation better with no luck. I can't even tell you how much we have spent to try and rectify the issue. The vet said there was nothing wrong with them that they just had abundant gas - lucky for us - huh. We moved about two months ago so I tried out a new pet store. I asked the tech there what she would recommend for the problem. Right away she recommended Purina One. The hard part was picking out the right one. Luckily, I struck gold the first round. I brought the food home, fed it to the boys, they loved it and guess what no more gas!!! Then I made a mistake the next time I went to the store - I picked up the wrong food and everything returned including diarhhea. I called the store to see if they could track down what I had bought the first time and luckily for me they did. I ran to the store and got a bag. Two days later all was good again. Thank you, Thank you, Thank you, You don't know how happy I am to have this issue resolved.