We are a bag in and no adverse reactions. I have a 10 year old boxer with a very sensitive stomach so I was really worried about switching him. I compared all of the ingredients of Wag to what I was feeding and the comparison held up, plus, Wag doesn't have a couple of questionable ingredients that the other food had (that affects kidney function). After the initial change over, the boxer has not had any stomach issues or excess gas, which was a problem with other foods. I have 4 dogs and we are 4 for 4 for them liking this. When the bag arrived I opened it and one of the dogs actually started eating straight out of the bag, he has never done that with the other food we were feeding. To everyone who is saying it is pricey, I am wondering what food you were feeding. A good food isn't cheap, and Wag saves me $30 per bag over what I was feeding and I feel confident feeding Wag to my fur kids. I did the research, I did the comparisons, and I am happy with Wag.